I'm close to landing my first client(s) - if I were to start getting income, what would be a good way to reinvest those funds to help further my no-code journey/resources/growing?

What did you do?
I would use them to buy the tools that I couldn't before. Maybe pay for a year membership for that no code tool that you use on a monthly basis.
I did this! In February I put aside funds forΒ a years worth of integromat!Β 
I re-invest into supporting other makers’ work or getting new tools!