@psychteach thank you for your kind words. I truly hope you have a smooth and speedy recovery, too. I know that you are well-prepared as you've been here on bonesmart. We never know what our unique experience will hold, but I trust that your fears will be relieved and will soon turn to excitement that your day can't come soon enough

.
Is there a chance your OS can prescribe pre-op (my PT calls it pre-hab) PT? It would be great for you to have the experts advise you! Alternatively, check the web & YouTube for hip replacement pre-op exercises. Here's a page with great basic exercises.
https://www.trinitashospital.org/total-hip-pre-operative-exercises.htm
Most importantly don't overdo (my PT did not want me in pain, however, I will admit I worked thru pain because, I wanted to build up strength and figured my pain will go away after surgery). I believe it all contributed to a speedy recovery. I did all of these exercises pre & post surgery. Am still doing them as prescribed by PT, 4 mos after surgery. So know they are important basic exercises.
You don't have to use an elastic band.
Good form is important - standing straight, shoulders relaxed, core/abdomen taut/engaged. BREATHE throughout the exercises!
Very important: GLUTES engaged on all exercises. If you need to hold onto a chair, then use one hand and place other hand on your glute /butt. Feel the muscle engage/tighten - then do the leg extensions/abductions.
Leg raises -toes to your nose & squeeze/tighten thigh muscle (quads) when raising leg. Again, assure glutes engaged.
I did not realize how VERY critical the strength of my glutes are for healthy hips and back. You can do all the exercises and they may seem easy, but if you're using proper form & engaging the muscles, you feel the difference.
Additional exercises:
hamstring stretch - towel or strap or band around foot & in hand. stretch out leg, straighten out knee. both sides 3 x hold 30 sec
piriformis stretch - lay on back, cross right foot over flexed left knee/thigh (like #4 shape). I use a towel and wrap around left thigh & pull towel/left leg into my chest, hold. 3 x 30 seconds each side (this is most difficult for me on R side) at first, I could barely get my foot over knee, when left knee was flat.
hip flexor stretch: lie on floor or bed. Both knees flexed/bent. bridge/lift pelvis up, down. Tighten glutes. repeat 3 sets 10
calf stretch - stand on slant board (varying angles - I use #2) step up, toes forward, stand straight 3 x hold 30 sec. Alternatively, stand with toes on edge of step on stairs (hold handrail) , lower heels, feel stretch in calves & hold.
Do you use foam roller at all? I'm finding I should have used this religiously pre & post on quads, IT Band (side of hip, down to knee), lower back, wherever I feel tight, it loosens up muscles.
Anyways...maybe this is too much info

, can only say its what I've done (or should have done more of - foam roller) and have no doubt it contributes to my continued wonderful recovery!
Again, warmest wishing a & blessings to you. Also, thanks fr choosing teaching....our kids today need you! Xoxo