Wavingrl, God forgives freely and once and for all. Whether others do or don't is their issue with God. You have no power over that, except to pray that God soften their hearts.
As for where you worship, good luck. Pray for discernment and guidance. You'll end up where you are needed. No one can make that decision for you but God. I can't tithe to the church I was born in, baptized and married in, that my ancestors built over 200 years ago. They tithe to the World Church, soon to become the false prophet's platform. It is very hard to
find a church that preaches Christ.
(And no praying to saints, or mothers.) Christ said to
pray to the Father through Him.
I would suggest a Bible study group for actual knowledge and understanding, and a church that needs your area of expertise, so as not to forsake the assembly.
As for those memories, they are Satan's delight. You can't change the past, your past is forgiven. And you don't have to give Satan a moment of your future. So simply refuse to accommodate the negative.
Darkness and light cannot exist in the same place at the same time. Darkness flees when Light shows up.
So sing.
God considers praise a sacrifice. Sing your favorite gospel song. The dark thoughts may creep back in, so you may need more than one song, but God will hear you and He promises peace, and He keeps His promises.
You're a child of God. If He's for you who can be against you?