I also started using a wacom tablet as a mouse replacement. The absolute positioning of the pen removes all these small-dragging-motions.
https://store.wacom.com/us/en/product/CTL480/
Which tablet is most effective as a mouse replacement?
1) Small sizes scale up surprisingly well, but one model bigger might be preferable.
2) One should test the feel of the pad -> there are different surface types (some are very glas-like, others offer more resistance), and different styles of pens, which all feel different.
3) I feel like many of the pens are quite uncomfortable to hold. If I had to use them for longer I'd probably look into finding 3rd party alternatives or a small pen I can embed into a custom grip. Different styles to exchange regularly (every 30 min or so) would also be nice.