Your FH is looking good for this stage. As mentioned by others it's a little stiff, but for less than 2 years on the clock I think you've nailed it technically. Don't go overthinking this stiffness, it's something to adjust slowly over time.
I wouldn't worry about equipment too much if you put these hours in, you'll get used to most of it pretty quickly.
I agree with you. OP's forehand looks good. I can definitely see some weight distribution and core being used. When he is in rhythm and the ball is coming at him, it looks good.
The OP can certainly relax more and has a bit more explosion in the loop. But I also agree that it is something one needs to slowly adjust over time if there is no coaching.
At the club, we have a young 20'ish player who has been learning for a couple years at the school club. He has progressed along the way but finally got serious the last 3 months and coming to our outside club at least twice a week. It is interesting because once he comes to the club more, many many players give him lots of tips. In order not to confuse him, I just told him relax and then explode on his forehand side. I kept on telling him that he is too tight even in resting position; how are you going to explode when you are already tight standing there? Recently a lightbulb went off in his head and he is playing so much better now. Sometimes, you need time for the brain to click.
I would not mind hearing OP's opinions about the equipment.
