Hoping to buy a house and have more projects than I have time for! By the way, angle grinders are absurdly dangerous when used even slightly non-standard. Take a look please. https://youtu.be/o-imZgxAyIE Angle grinder rotation speed is enormous compared to circular saws.
I have trouble cutting straight with saws too. Switching to a Japanese pull saw has helped a ton, and they can be bought online for like $20