One note on a lot of interior work. You probably won't get a great roi , dependant on market and circumstances of neighborhood on the cost of upgrades.
However, if you do the upgrades yourself, and with good quality work, you should return enough to pay yourself well for your time. If you make little money, it could be the best work out there.
For example, my house was built in 1940, had two or three remodels w. additions. Had laminate countertops on top of individually built original, and in excellent shape oak cabinets. Laminate was going bad. I pulled the laminate and replaced it with granite and butcher block, did almost everything myself. The remodel took the lowest value part of our home, and upgraded it to match the general quality. Contractor price for our area was $6500 ( big kitchen). Estimated value added,~5000. Cost to us in materials and hired labor $1625. My time invested, 80 hours. Pay per hour was better than any other work I'm doing.
So it can be a way to pay yourself for your labor, as well as potentially build a portfolio of your handyman expertise. The value there is exceptional.
There are some tasks that will pay for themselves to hire out. But most of the time, the advantage of a remodel is in controlling the materials and the source of labor.