I'm not very good at it either, but the basics are not very hard. You walk or run forward looking at the ground at a bit of an angle and just place blocks. The best suggestion is really to open YouTube, search for Bedrock bridging and watch someone else do it first. Then open up a new world and just build bridges left, right and centre. And you know, what they say, practice makes perfect.
I'm sure you'll get the hang of the mechanics rather soon. Good luck and have fun with it!