Achievement of learning goals and objectives is something that requires discipline and planning, in this way you can achieve whatever you set your mind to in this infinite task of learning.
Yes, there are some things in life that you will never be able to learn. I will never be able to learn quantum physics. For some strange reason lodged in our brain there are certain individuals more prone to assimilate scientific concepts than others. I was always pure letters 😉
Here are some disabling thoughts that hinder the achievement of your goals:
1) It is difficult. I can not do it.
2) I am too lazy.
3) I really don't need to do this. I'm fine the way I am.
4) I feel sad right now. I can't do anything when I feel like this.
5) I've failed at this before, so clearly I'm not capable.
6) I don't deserve this. I am not good enough.
Okay, it may not be easy, it may not be fun, but most of the time, with proper research, training, planning, preparation and perseverance, you can learn what you set out to do if you really want to do it.
This is the key: You have to love enough to turn your back on comfortable excuses and feelings of fear.
If you really want to learn something, it will be easier for you to reject any excuse. Do not underestimate yourself, there are a lot of things, million things, that you can learn, focus on your goals.
There are unlimited resources to help you do what you want to do. You can use Google for anything and, best of all, for free. There are books, courses, workshops, mentors, teachers, and coaches available to help you.