I can’t believe someone hasn’t linked this yet, but here:
The Ultimate Japanese Resources List
I’d recommend picking a resource from each of those sections, e.g. kanji, grammar, speaking, writing, etc.
As long as you cover all bases, you’re sorted. I could recommend some grammar resources that have worked for myself personally, but I think it’s really much more beneficial to find what works for you.
Something it took me a while to realise is that if a resource is not working for you, find another one. Do not stick with something that isn’t letting you progress. (This is not to say just give up on something two minutes in. Nothing will make it ‘easy’ per se, but you will certainly know when you find something that is working 
).