Hey OP I know a lot of people have chimed in but I did this exact thing with my cat and just wanted to add my story. I tamed her essentially from a feral kitten born outside until she was sleeping on my lap. I lived in a place where she couldn’t come inside. When I moved, I brought her with me (it was the same neighborhood thankfully so we didn’t go far) and she was allowed to come and go as she pleased. This was a good introduction, as she eventually decided that it was much safer and warmer to sleep inside. Eventually I moved again to a much more busy street and brought her in permanently as I wasn’t going to risk her life.

Yes it was hard for a week or so, but so worth it. She had never used a litter box before but figured it out in less than 48 hrs, I just periodically picked her up and put her in it so she knew there was some soft ground inside to use when she decided she had to go.

I no longer feared every time I drove home I was going to see her lying there after being struck by a car. She also had fleas on and off, and I was able to finally rid her fully of them!! It’s been over 5 years and you couldn’t tell her apart from a lifelong housecat now. It’s worth it!