I made the switch about couple years ago as some really good folks who I trust mentioned that I would be better off if I made the switch to spin and i was always interested in spin bowling.
First one year was not great, I was experimenting with my action, grip, run up, delivery stride, etc and was always afraid of bowling loose balls every over, which held me back I felt. Then i realized that I dont have to worry so much about bowling the loose balls and rather only focus on bowling as many good balls as possible with the understanding that it is ok if i didnt bowl good balls at 100%. At some point later, I figured out the perfect action, grip and technique in the middle of one a game and that was the one that I could stick to to repeat over after over with confidence. Now I have confidence of my ability to keep the bad balls (full tosses/half trackers) to almost a minimum. And where I know I might bowl a loose ball, I try to protect with my field placings. So then, I started experimenting with some variations. Again when I try those variations, I ended up bowling bad balls. However, I am confidant just like my initial struggles, i will get over those at some time. Overall, the learning process and results has been very interesting and exciting.
Lastly, no matter how many videos you watch or people you talk to, I realized one needs to figure out what works best for them and that happens only with lot of practice and games and taking a learning/positive approach to failures. Good luck..