Practice copying down sentences using words you know. I used to copy poems and it helped a little, but only when it came to writing poetry! You could also find a märchen and copy sentences from that. Sticky notes are my friends! I would put the German word for something (ie: the desk, the lamp, ect) and see those daily. It helped me with der, die, das. Grade wise, I can only encourage you to study and practice writing, reading, and speaking daily. I wish you all the best! Viel Glück!
Sg.
1. ich (I) -e
2. du (you) -st
3. er sie es (he she it)-t
Pl.
1. wir (we) -en
2. ihr (you) -t
3. sie (they) -en
Sie (example Here you are teacher) -en
Lesen
Ich lese du liest sie liest