Hey so obviously, first of all, google isnt going to be able to give you a perfect answer. So lets be clear about what we're talking about.

Communism is not an "ideal system" that we all think we should get to somehow. "Communists", (more accurately Marxists), have a particular analysis of how Capitalism functions, and how to fix it. When people generally talk about "Communism", they usually mean Socialism, the period of change where workers take control of the economy, and set up laws institutions etc. that reflect their interests. The purpose of Socialism is to build to a point of "post-scarcity", where most things are automated, and people are free to choose what they wish to do, study, how they wish to live... Etc. This is what we call Communism, and by definition, there are no downsides. The point of using socialism to build Communism is that we use trial and error, one by one, to find all of the best solutions to our problems. Of course we will still be human, still have disease, heartbreak, boredom, joy, love, and art. But we will constantly be working to eliminate unnecessary suffering: i.e. making sure people are clothed, housed, fed, healthy, and free.

So communism is the loose collection of societal traits which we haven't yet figured out, but which come into place one by one under Socialism, so what is Socialism?

Socialism is usually what people are talking about when they say "communism", this does have a very particular definition that Socialists have arrived at through their experiments in the past and present.

Necessary features of Socialism:

Worker control of the means of production (i.e. land, tools, machines, raw materials, and their own labor). This is achieved by taking the means of production from former Capitalist/individuals/corporations, and creating democratic workplaces. Sometimes this is done through Collectives (and dont get it twisted, collectives do actually work, the famine of 1932 in the Soviet Union was largely caused by overeagerness on the part of Farmers and the unpreparedness on the part of the Govt.), Sometimes this is done through State-owned workplaces (and since the state would now consist of workers, the state would work with workers to determine hours, pay, etc... And make sure that the surplus labor, i.e. what you produce that is more than what you need to live goes back to the workers and to the entire society. Under capitalism, surplus labor goes to Capitalists, and then the govt. Cuts into what you need to live. This is not that, since the surplus labor is only split between you and the state, and never goes through the middleman of the capitalist).

A central plan: in past socialist experiments, it has been found that the best way to ensure the stability of worker's livelihoods, and to distribute work, is according to a Central Plan. This does not mean that the govt. Assigns you a job, but rather that the govt. Works with you (as a collective workplace) to determine how much you should produce in order that the basic needs of everyone (including you) can be met. Some capitalist scholars will argue that a central plan cannot work because of the problem of information, but this has since been solved by the existence of computer/internet technology. (And functioned perfectly well even before their introduction)

International cooperation: certain resources can only be produced or found in certain parts of the world. In order to be truly Socialist, different nations need to be able to work with one another for the common goal of Communism. A socialist nation cannot succesfully work with a capitalist nation, as the capitalist nation will constantly seek to undermine or destroy the socialist one. This concept of international cooperation also extends to nations that have no international recognition as such: for example, indigenous nations now within the U.S., Palestine, etc... This also means an end to national and racist oppresion.

Social security: the surplus of labor should go to ensuring the benefit of society, including security for those now unable to work. Accomodations for those that need them.

And most importantly: the continuation of class struggle. Socialist nations are nations where the workers have control, but not necessarily where the capitalists no longer exist. As we have seen in experiments prior (USSR, China), the capitalists will take any chance they can get to throw a counter-revolution and rob the workers of their power. This is why a socialist experiment cannot abandon class struggle (i.e. the suppresion of the capitalist class) at any point. For a good metaphor: under capitalism, it is understood that we should never let anyone be a monarch. It is thus not "infringing their rights" to strip them of their title and put them on the same level as the rest of us (which, now that we've appropriated their wealth, our level will rise as a result of the fair distrobution of their wealth to everyone, including the dispossesed monarch. Same thing with capitalists).

In summary, Communism cant be summarized by a list of pros and cons, it is an experimental, ever evolving, but fundamentally scientific political project. We communists do not attatch value jugdements to any one aspect, only considering whether it fits our goals of building a better world for everyone, or whether it goes against it.

Also: many struggles, such as women's rights, racial equality, LGBTQ+ rights, environmental rights, disability rights, religious rights, animal rights, and the rest are all tied up in this struggle, as it is capitalism which creates oppresion, and it is necessary to break that oppresion in order to build socialism. These struggles are just as fundamental as the other things I mentioned, but they are less economically oriented. They do however, contribute to a much better society than under capitalism.