How do you decide the tempo for your songs? Do you specifically right it down first or have a rough estimate of where you wanna be?
get a metronome, make a guess, try a few bars, adjust it until it's close, then when it's close, play the song all the way through at that tempo, and then ask yourself if you thought it was too fast or too slow. and then change the metronome accordingly, and repeat this process, changing the metronome smaller and smaller amounts. and i only stick to integers because i think it's good luck