Thanks y'all for your advices.
The truth is that I am still quite lost / overwhelmed by the amount of information in the form of videos, reviews, articles and stuff like that. I know that these questions tend to be quite recurrent, and the most forum veterans, they will be tired of answering.
I chose a 104HP system, thanks to a Perfect Circuit video where Sarah Relaid recommended starting with a small system, and I started with that idea in mind. As you mention, in the long run, the investment of money will be much higher due to the lack of space and the poor decision of the modules acquired.
In the current scenario, and given my little experience, I consider the following:
Start with a semi-modular system where the options I was considering are,
Make Noise O-Coast / O-Ctrl - Mother32 / DFAM / Subharmonicon.
Other options are, as Lugia suggests, is to get a B2600 and gain experience, to later, and with better knowledge, move to a really coherent Eurorack system in terms of modules and orientation of the sound that I'm looking for.
Do you think that is a good option start with a semi-modular system?
Thanks again!