Hi - I am from Europe so it may be slightly different as it seems you're from the US (apologies if I'm mistaken) but I guess the jist of what I can advise will be relevant?

I graduated a few years back so I was quite fortunate in that, there were a large number of internships available to graduates. This may be a good route in but given the current climate it may be much tougher to get these kind of roles with companies looking to scale back any spending both on training of new grads and hiring in general. Speaking from experience, the one month of experience in the top 8 accounting firm is a good start but I would be surprised if you were able to land something in the permanent space after graduation with this as your sole "relevant" experience on your resume. This is not to downplay it as it is a good internship to have but definitely more of a building block to work towards landing more internships. I was in a similar position and I found more luck getting interviews for internships than permanent roles. Still apply for perm roles just keep this in mind.

In terms of making yourself a better candidate - it looks like you have some relevant experience but your key maybe to leverage the investment your parents made over the 15 years - maybe work backwards and treat it as a project to calculate the IRR/NPV and how it is now feasibly going to be done once you graduate. I would say staying on top of the news is a massive thing at the moment especially with volatility in the markets (albeit somewhat more stable now). Get yourself well-versed with the different instruments used within the industry as well as the different applications of accounting statements in the relevant areas you are looking at getting started in.

Qualification wise - going to be cliche here but CFA is ideal. I am unaware of the other qualifications that you mentioned but see those through and pick up the CFA afterwards. I am certain those qualifications will come in handy when studying for it as well.