I heard of Maybe, I invested in them as well. I'm actually looking to do something similar as a COSS, same niche as well but not exactly, more of a budgeting to

I heard of Maybe, I invested in them as well. I'm actually looking to do something similar as a COSS, same niche as well but not exactly, more of a budgeting tool like YNAB rather than a full blown investment tracking tool, all open source. Any tips you have for that and for COSS in general?