If you already have an ipad, I do recommend using procreate. If not, then you'll certainly need a drawing tablet. While photoshop is certainly popular for its features and is the standard for the industry, you could use other software which might be as good as photoshop. Depending on what you mainly want to do, other software might be better for you. For example, since i'm more interested in illustration and comics, I'm satisfied using clip studio paint. I have never used photoshop, since the price is really high for beginners and I never really intend to be a working 'professional' artist. If you think the price is no problem and you might used the features offered in photoshop then go for photoshop.