Is it normal that i'm having difficulty pronouncing "r"?

It's rhotacism and it's something you can fix with training. Google it.

If you say r instead of w and vice-versa, then just imagine it as the other. Also, make the tip of your tongue at the top part of your mouth.

I always wanna pronounce it as an L. It annoys me to no end

It's quite common, I've come across many people who speak like that.

In ways I can relate, as I had a speech impediment growing up, although with me it was "S" rather than "R". With training though I overcame it and I speak almost perfectly now. I'm sure you can overcome it too with some speech therapy (if needed).

I avoid the word "strategy" and "tragedy" as much as I possibly can. Both of those words come out as an inbred mix of the two for some reason.

Willy?

I can relate to that