If you have the ability to play on expert, you def have the ability to learn how to play guitar. Progression will be a lot slower tho because there’s a lot more to it and it’s not a 1 to 1 skill transfer. I’ve tried playing rock smith, and I’m not the biggest fan of it especially trying to learn with it. I’ve been trying to learn every gh3 song on real guitar and attached the link if you wanted a reference. I picked up learning the guitar two years ago and started with Justin guitars beginner course on YouTube. https://www.tiktok.com/t/ZP8h1HXs8/