Here are a few that I've used in the past: https://android-developers.googleblog.com/ https://developer.apple.com/app-store/whats-new/ https://developer.apple.com/news/ https://store.steampowered.com/news/group/4145017 What do you follow to keep up with platform changes?
This was the book that I wanted when I started working in release management. https://www.lulu.com/shop/paul-sequeira/release-management-optimization/paperback/product-57gz44r.html?q=paul+sequeira&page=1&pageSize=4
Here is a case study on release management on what went wrong in the July 19 2024 BSOD issue: https://www.releaseoptimization.com/release-optimization/crowd-strike/
Where are you doing things more than once manually? Are you playing with excel to format data? Where do your systems meet? Source control to Project management task tracking to the build system, are there opportunities to connect the systems to have less reliance on any manual processes?
Everything you do more than once should have a runbook that anyone can follow. Include the relevant links, and a simple checklist. Checklists are key: https://www.youtube.com/watch?v=55Nc8nccPa0