I’ll second the advice from everyone else to start grammar sooner rather than later but I will suggest using Graded Readers to start putting the grammar you’re learning into practice.
Since Graded Readers are meant for foreign learners of Japanese they use controlled language and grammar so that the difficulty gradually builds as you go up the levels, meaning you shouldn’t feel out of your depth with them the way you can with native material.
There’s also a graded readers ‘book club’ thread you can check out.