Hi @mediaklan absolutely not. The timescale is very much up to you. If you do one song every 2 months it doesn’t matter.
Just pick a song you like the look of and give it a go. No pressure, just have fun. The bonus is that it really improves / supercharges your progress by focusing on learning songs IMHO.
If you don’t like any of the songs you can always pick one you do like and post it in the ‘post you covers thread’. It doesn’t matter how ‘well’ you play. It’s just the giving the thing a good go that’s important.
https://forum.bassbuzz.com/t/post-your-covers/3763/8409?u=barney