Help this Newbie Guitarist on the Journey to ROCK HARD!!! ❤️‍🔥🤘

Hey guys! I just got my first electric guitar and amp yesterday, and I'm super excited to start learning! I'm planning to teach myself using Justin Guitar, but I have some doubts and would love your advice.

1) Learning Directly on Electric Guitar

Is it okay to start learning directly on an electric guitar, without begin with an acoustic? I'm into rock and metal, so I prefer electric. Will skipping acoustic cause any issues in my learning?

2) Is Justin Guitar a Good Resource?

Does Justin Guitar cover everything from scratch, or should I supplement it with other resources? Are there any better options for self-learning?

3) Scales and Fundamentals

I keep seeing posts about pentatonic scales, major scales, and other fundamentals. What exactly are these, and why are they important? Could you please explain whats their importance. Does Justin Guitar cover all these things?

4) Progress Timeline

I plan to practice for about 2 hours a day. How long does it usually take to complete the beginner phase and reach an intermediate level where I can start learning solos? Is 6 months a realistic timeline with consistent practice?

How long did it take you to learn all the basics and become good enough to move to the intermediate level?

5) Finger Exercises

I know about the spider walk exercise, but are there other good finger exercises to improve speed, strength, and dexterity?

6) General Tips for a Beginner

What are some common mistakes to avoid? What should I focus on in my early stages? Any general tips that could help me become a solid guitarist?

Looking forward to your advice! I’m excited to start this journey and would love any tips or guidance you can share.

Thanks in advance for helping out this newbie guitarist. Rock on! ❤️🫂