A deliberate practice app for guitar players who want to level up

Finding a great teacher helps the most. I self-taught mostly and had a teacher for the first ten years. Learned some not-great habits with both right and left hand that took me some time to unlearn.

Find a teacher that can play the stuff you want to eventually play. Then take some lessons and assess whether you enjoy the process of working with them. Learning scales and doing exercises to get better will feel like a grind no matter what. A good teacher will give you enough variety to stimulate growth and make you have an appetite for the process of improvement.

Edit: meant to mention that buying a used guitar is a great way to save money, too. You can buy from Guitar Center's used section and have a 45 day return period. If you live near a store, you can just take it back there, as well. If you're not sure how to assess the instrument, you can buy something from there, take it to a guitar tech and have them check it out/set it up to make sure it's ok.