For some stuff, it is absolutely worth it to do yourself. Other stuff, maybe not.
For my wife and I, we decided to flip houses a few years back, so she quit her job and became a carpenter to learn skills. I also started reading and watching videos and stuff, but kept my non-construction job. It's work we both like to do.
We ended up switching into more of a landlord kind of mentality, but we did fix up two houses and sell them for way higher than we otherwise would've. One of the houses/condo had a quote for $35k just to replace some flooring, and redo a bathroom. We ended up remodeling the whole thing (2-3x more work/materials vs the quoted work) for $10k in materials and our weekends/afternoons for a month or two.
We didn't even care if we saved money or not on the first one (even though we did) because A) We had certainty over the timeline, B) We 'earned' an education which will pay off hugely for future projects. I know we certainly won't be making the same mistakes again and probably could cut that material cost down by another 20% with the same results.
This only makes sense if your 'education' actually gets applied later - which it won't if this is the only house you plan to ever remodel. There is some carry-over for stuff like general carpentry that would be useful. There is other stuff like electrical code which is unlikely to ever benefit you unless you plan on literally doing that exact task again.
We're remodeling the house we live in right now, with no rush since we aren't going to sell anytime soon. That's a whole different story. Living in the house you're remodeling is miserable. If we were living in the condo we remodeled, it would've taken at least 3-4x longer. This is because in order to do many tasks like flooring, you ideally want to tear out the whole house at once. Going room by room, moving your stuff around, covering furniture for dust, etc... takes forever.
If you don't plan remodel a lot in the future, I would stick to general carpentry as that has the most carryover - stuff like installing cabinets, trim, flooring, tiling, etc... Maybe paint too. Stay away from complicated or high power electrical and working with existing plumbing (doing whole house pex retrofits is ok though).