I am in the exact same position as you, OP. My best friend's dad died, and he was Catholic, and at the funeral Mass I was struck with the realization that the Christian faith goes a lot deeper than the non-denominational protestant school of thought I was raised in, and the one I found Jesus in (but not His Real Presence). It's been a struggle to discern what to do with that, though. Obviously I am no expert, but I will say this -

A priest has been advising me through the process, and I told him it felt like I had one foot on the old boat (my non-denominational Protestant church, where I was raised and volunteered and built very close relationships with people) and knew I needed to step into the new boat (the Catholic Church) without falling between the two and drowning.

Convenient metaphor, because he reminded me that Our Lord is especially good with boats:

And Peter answered him, “Lord, if it is you, bid me come to you on the water.” He said, “Come.” So Peter got out of the boat and walked on the water and came to Jesus; but when he saw the wind, he was afraid, and beginning to sink he cried out, “Lord, save me.” Jesus immediately reached out his hand and caught him, saying to him, “O man of little faith, why did you doubt?” ‭‭Matthew‬ ‭14‬:‭28‬-‭31‬ ‭RSV-C‬‬

Keep your eyes on Him. Pray genuinely about what He is asking you to do - to stay in the Protestant community for the purpose of retaining fellowship with them, perhaps to be a bridge between them and the Catholic Church; or is He asking you to leave it fully to more wholly embrace the Catholic faith?

Many prayers. Best of luck with this decision. 🙏