>>1214958Building the press for the bottom bracket and headset was actually one of the cheapest tools I've had to buy - just a bit of threaded rod, big enough washers and a couple nuts to press everything together.
But yeah, definitely recommended to start with a single-speed so you don't have frustration with setting up the derailleurs, those always have threaded bottom brackets which are easier and the standards are quite a bit more standardized as well.. even easier if you can get a frameset that has the headset already installed, after that a single-speed shouldn't require anything complicated to put together, maybe ask a local shop to cut the steerer and hammer in the star nut since those can be a little difficult to do at home.