Hello, it is difficult to start with, but keep going!  When I start a new tense, i frequently click on the "blue name" of the tense in the introductory paragraph of each lesson, this reminds me of when and how the tense is used.  I probably have to do this 100 times before it sinks in.
To practice conjugation alone (without the context mentioned above) I use conjugato, an app on my phone, that drills you in the verbs.
Good luck

My ‘bible’ is 501 Spanish Verbs by Christopher Kendris.

im going to look into conjugato like someone above said but I believe Spanishdict.com has conjugation practice as well.  Good luck, Im in the same boat. 

Spanishdict   can let you practice one verb at a time.   I bought conjugato.

Spanish dict put the verbs into a sentence.   and Ellaverb is good also.

I have conjjjj and with that one you do all the pronouns at once.   Would be nice if they had something here.