Welcome back. “All” you need is a massive infusion of Divine Grace via a supernatural encounter with God himself in which you confess your sins and beg for forgiveness and Grace. Fortunately, most catholic parishes offer this freely at regularly (if inconveniently) hours on Saturdays.
Welcome home! (And don’t be surprised if you get a tepid confessor. God has a sense of humor like that. He’s probably just making sure your faith is in HIM, not just in a good priest…)