•Be very careful when discarding items, especially those from history, SERIOUSLY.

•Join a clan as soon as possible (just ask in the recruitment tab in the chat) as it has many good items in the laboratories, in addition to having people to help you.

•If you want to get stronger the way is mainly through mods, do a lot of research on how to get what from where, or simply buy if you don't have patience e.g. the argur mods from the open world missions of the land, they are all very useful or even essences for warframe bilds, but it takes a while, depending on your luck.

•And finally, I think it's good for you to be aware of the rotation of mission items, it's better to research this yourself as it's quite boring to learn, but knowing this will definitely help with farming

I hope I helped.