u/AdmittedlyUnskilled

I'm only on my infant days of djing and currently learning how to beatmatch by ear. I mostly just download mp3s online just for practicing but now I'm thinking of subscribing to some streaming service so I can easily access different music for practice. I'm using a DDJ-FLX4 and Rekordbox

I don't wanna spend too much since it's only for practice so I don't really plan on buying tracks for now.

I tried 127 like what Google results say. Tried 129 like what Gemini said. Also tried 64 and 65 to try to half. It aligns on the first few bars but becomes way off at the middle part of the song. Any tips on how to catch the proper grid? I tried the tap feature on Rekordbox which is showing me around 64 and 127 as well.

Edit: Getting a lot of varied valuable lessons here. I really appreciate it. Thanks!