1). Would UE4 be suitable for a one man team(Myself)?
Yes and No. If you do not want to create the next Skyrim, you’re ok on your own. Don’t underestimate the “work” part of creating a game. That means: a lot of boring, hard, long hours of work. Be realistic about what you can do, what you can’t do, what you can learn and for what you will need help from other people.
2). Since i can’t use C# for creating gameplay, should i learn C++? (I don’t like visual scripting, i feel more comfortable with code. So Blueprints might not be the best for me)
If you want to program UE4, C++ is a must. But don’t dismiss Blueprints. Use them. They are cool. Really. Make everything in Blueprints, this will help you understand the engine. Later, replace parts in C++, if you need to. You’ll see that you really do not need a lot of C++.
3). I’m coming from Unity 3D because i would like to try something new, and i have been using Unity for many years. I am going to move from Unity 3D to UE4 if it suits my needs, so would it be a good idea to start learning UE4 even though i am alone?
Youtube, Forums, Answerhub. I know it helps, I did it myself. Start with the beginner tutorials (even if you think it is boring).
4). If i should learn C++(Obviously i don’t have any choice, as i don’t like visual scripting), do you have any great online course in mind, or a video series? Because i’m sure i learn best from videos, whenever i tried a book i always got bored.
There are many places on the web to learn C++ . Again, don’t dismiss Blueprints. Give them a try.
You want to create a game - create a game, don’t learn C++ 