I’ve been doing a lot of inside photogrammetry lately - it gets a ton easier as you practice! I’ve been able to capture some pretty fun scenes just with some handheld shooting, but I invested heavily in a camera with IBIS (a6500) and a really good wide angle lens (Zeiss 12MM). I have been surprised how much better my shooting got after the upgrade, but I was still doing ‘well’ with an older camera and a cruddier lens. Shooting at 11 fstop is also heavily recommended.
Take tons of pictures, even if you hit 1 or 2K you’ll be fine. Regardless of good practice you read priority one is no blur, followed by 100 ISO or lower whenever possible (I used to hit 200 or 400 ISO to keep some exposures down below 2 seconds in low light, but I find staying at 100 ISO is best regardless of the exposure length). I use Image Stabilization as for those long exposures even on a tripod as people walking around (such as myself) can give some shake and add that blur which tanks the scene.
Once you get the hang of it, you can burn through indoor scenes rather quickly depending on what you’re hoping for the end result. What has made me improve in leaps and bounds is I spend 15-30 minutes max during a lunch break to see if I can capture something handheld every other day. Tons of fun! Nothing better than going to bed, putting your lunch time scene in the queue and waking up to see how well it captured. Each iteration you’ll have a light go off in your head and your next scene collection will be that much better.
These have been decimated for the web:
Somewhat outside scene in some solid drizzle, 15 minutes: https://skfb.ly/Xqpu
20 minute shot at a friend’s store: https://skfb.ly/X9BI
(better detail of a table): https://skfb.ly/X9wV
My first indoor shot, done with some crappy hardware: https://skfb.ly/VNAx (started learning my post 3d work in this one so it is midway first attempt and looks real bad as a result)
On that last one, I went in to redo a few exhibits with my new equipment and realized after I RCed it that I could have done the whole room in literally 1/3rd the time with much better results with what I had learned and my new set-up. So stick with it!