Technical Analysis 101, for sure!! because it will provide an introduction to all of the terms related to trading, and that way you will understand the jargon a little more
There are many many many MAAAAANYYYYY tutorials on how to build sveral algorithmics bots out there in youtube or on paid platforms, or even you can buy a bot ready to trade!!!
But, going back to the question, you should do TA 101 and then algo trading