I don't like Photoshop because it's very difficult to use. You can really get no less functionality, but a more understandable control panel and more comfortable tools to work with using online extensions or other graphic design programs. When it comes to creating mockups, you don't need to use vector graphics programs if you use free files like these ones https://www.ls.graphics/free-mockups/magazine-mockup . So my point is that you don't have to do too hard work to edit images or create a design project.
If you are looking for Photoshop tutorials, then it is best to buy them from the developers themselves. Although, today there is a lot of information on the Internet and free videos on YouTube. Moreover, if you are looking for free mockups for Photoshop, I recommend this service https://www.ls.graphics/free-mockups. Minimalist clay mockups and versions of the official colors, the highest quality flat designs and stunning animated mockups, perfectly balanced compositions, unlimited possibilities - choosing what's perfect for your project has never been easier.