I’m late, game recommendations are covered, but I can give you advice for healing your thumb. I’ve had the tips of my thumb and a finger glued back on as well as stitches on my fingers several times.

Blood flow to the tip is important. Squeezing a stress ball or something helps. It’ll also keep the skin from healing too… tightly? If that makes sense.

Keep it dry. If you need to bandage it, do it loosely and change it often. Cotton balls work really well to keep it dry as well as protect it from accidental impacts.

If the doctor didn’t do a good job, trim the stitches so they don’t catch on anything. If you’re in America, take the stitches out yourself after 10-14 days or as soon as you can wiggle them freely. Nail clippers work really well to cut the stitch and pull it out.

If you rip a stitch, you can use a careful dab of super glue to close it. Just make sure it’s clean and dry first.

If you cut through the nail, it’ll grow back kinda fucked up. My nail healed in an M shape and dirt would get trapped in the middle so I put some Vaseline or something under it to keep it clean.

Last but not least, you have a small window in which fingerprint evidence may be inadmissable in a court of law. Do with this information as you will.