Anybody have online resources for writing/reading Japanese sentences!

I would suggest based on your level you can start reading NHK Web Easy and look up any words you don’t know. I do this alongside the web extension rikaigu to look up words I don’t know/can’t work out on my own.

Some other things I use are:-

Highlighting plugin
Hiding context sentences
Wanikani Context Senteces added to reviews

You can practice your hand-writing through your grammar studies or for writing in general Hello Talk is good as native speakers can advise you. I hand write sentences to drill in new particles using words I have learnt on WK - particularly for conjugating verbs.

Also there are quite a few threads on this topic already which you should read:-