Great tips, also don't forget to strengthen your elbow once it's not too hurtful to do so.
Personally I used this, and some massages as well as the stretch above + regarding "creams" I think penetrex made the most positive difference for me. Although physisists seems to theorice no cream will work, but, believe in the placebo at least and it will help.
But definitely DO NOT do the cream and just play without strengthening or showing care for it, because then it will inevitably become a long term issue as I got because of it... Took me several years to fix as I was too inconsistent with my repair/strengthening.
Also, I'm not bashing stretching, but at the very least strengthening had the had the most significance to my recovery.
and one guy (in the last video below) is saying stretching might even be counter productive... but clearly everyone online seems to disagree about tennis elbows and it comes down to "what works for you" xD
regarding strengthening with dumbells, once you get "comfortable" with the excercises (see video), try doing increased weight at 8 reps three times (in one day). Most important to do the three "Forearm flexion", "forearm extension", "forearm pronation and supination", (do the others if you feel like it, I never did those so much, but I'd imagine soft ball is smart also) with a light dumbell, but try to keep your WHOLE arm straight while leaning unto something when doing the forearm flexion one. (my physisist recommended that as it's more effective)
https://www.youtube.com/watch?v=P76lkurJC_0
an alternative to dumbels would be to buy the flexbar, (look at 4:30 and out under) pretty much the same muscles as with the dumbels just slightly different.
https://www.youtube.com/watch?v=we4UoiKG3Co
Best of luck on your recovery!