OK. Nothing wrong with having an idea and seeking to implement that in UE4.
But as Clint Eastwood once said, ‘A man’s gotta know his limitations’.
Really - if you’re wanting to get a project going right now - you have to take what you know and start working with that. You want to go further than what you know - then you have to deal with that Jack Squat situation.
There’s a ton of classes in things like Udemy & Youtube. Check - Those - Out. OK - they may not give you direct instructions on developing the actual project you want - but you learn how things can be done. Take a Udemy course on user interfaces. Take a look at Dev Addicts Souls Like tutorial series. Look up Ryan Layley on You Tube. Matthew Wadstein… Learn how to blueprint a whole lot better than you can now. Very rarely will you get a nicely packaged solution presented right in front of you that does exactly what you want.
Get stuck in and things will become easier. Best of luck! 