If it can be done then I can do it...

Is this a normal way for an INTP to think? Where some people will pay someone else to build a website, or manage their buisness socail medias I would be more likely to say i can do that myself and save money. I resently started a YouTube channel because I was talking to a friend about her making maths tutorial videos to start a tutoring business from. She said she wouldn't know where to start to make the videos, so i decided to look into it and see how to do it, having never touched a video editing program before in my life. I have since taught myself to edit videos, make an intro sequence from scratch, add and manupilate audio files and make my own overlays and add them in.. in less than 4 months. I am not saying i am in anyway amazing at all of this, it is an on going project that over time i will get better at, but something i would never do is say, i can not do that. I would say i do not know how to do something and if i am interested enough in it i will learn how to do it. My next part of my project is to make my own website, i have used premade blog sites and forums before, but i want to make my own from the ground up, learning some scripting and using some templates. Any advice on places to learn about website building would be most welcome as well. X