Personally found this channel quite useful - https://m.youtube.com/@Beautyover50onabudget
It’s more about body sculpting, but advice is solid, just be aware that actually only 3.0 Unoseition models achieve near anything close to semi-professional power output, namely aim for 100W non-S-shape handle (S-shapes for some reason don’t go as high). But all machines recommended there are good, even lower level LW-101 like model and its Aliexpress clones, one just have to stay consistent.
Success in manifesting your ideal outlook!