Tomo Fujita Guitar Wisdom

Hello,
I am bit stuck because I do not know when I should watch a new lesson or when to keep focusing on the lessons I already watched so I keep repeating the same exercises over and over.
I feel I get a solid understanding of the topics, but having them automatically in my fingers is something different.

When do you know when to move to the next video/lesson? how do you know that you have mastered the topic enough that you can start adding more?

For example how do I know that I know enough of the C major scale that I can now look at D-Dorian or G-Mixolydian.
Or how do I know that I know enough of triads on 5/6th string that I can move to next positions in other strings?

Do you think is better to know a few topics and putting them in the practice routine (maybe learning some modes of the major scale and every day practice a different one) or better to fully master one topic and then add a new one to focus on and once in a while review the already mastered topics?

I guess a mix of the 2, but the question remain. How do I know that I know enough to move onto the next topic.

I would like to know the community's approach (and maybe Tomo's take on it). Thank you

My understanding of one theory of learning is to have regular reinforcement, which might diminish in cadence over time. For example, you might begin with a 5-10 minute review of the last 2 lessons, and do that for a week or two. You could be trying new lessons during this time.
Then, review these earlier lessons for less time, 2-5 minutes for a few weeks. And later, once a month go back and make sure you remember.
This is just one way, I don't think there's necessarily a "right" or "wrong". But if you add a bit of review you may feel more confident you won't forget, and you'll make progress towards mastery at the same time.
Also, Tomo does some review, so that should help as well.
I'm picking up the guitar after a 20 year hiatus, and was self-taught back in the day. My approach is to take it reaaaaaaally slowly, so I get your attitude towards mastering the basics.

I'd also add that you should record your practice session and see how stuff sounds that you think you already know. If you know it in your head, but it sounds a little rough in your recording, then you can make sure to review that at the start of your next session, then move on to the next new fun thing.

If you think the recording sounds ok, then great, move along, and always remember to use what you learned musically, whenever you are playing freely or improvising.