Welcome to the site! it really is about doing one thing at a time.. step by step 🙂
First really work on getting your pucker correct before moving on to playing from tab. However, I do suggest playing any tunes that may be in your head while still getting the pucker happening. For example if you can whistle a tune you can probably find it on the harmonica with fairly minimal effort.. and you can do this while looking at the ocean or a nice view 🙂
Then when your not thinking about the pucker any it’s playing well, look at tab..