There is a book "501 Spanish Verbs" by Barron's foreign language guides and in this book the authors list 55 essential verbs. I narrowed this list down to about 40 essential verbs. There are many different Spanish verb tenses and I am terrible at learning a foreign language so I made a Excel spreadsheet of Present and Past Tense only in first person, second person, and third person singular and plural. I carry this in my pocket and work the pueblo every day practicing with locals who are not bilingual. Poco a poco, I find it better to take it in small bites rather than be overwhelmed with the whole enchilada. This isn't a contest but rather a life long endeavor.
For example a common verb on my list is the --er verb Aprender - to learn.
Singular Present Tense
Yo aprendo..........I learn
Tu aprendes.........You learn (informal as to a friend)
Ud. aprende.........You learn (formal as to a teacher)
El, Ella .................He, She, It learn
Plural Present Tense
Nosotros aprendemos.......We learn
Uds., Ellos, Ellas aprenden..You all (Uds) or They all (Ellos,Ellas) learn
Past Tense Singular
Yo Aprendi..............I learned
Tu Aprendiste.........You learned (informal as to a friend)
Ud. aprendio...........You learned (formal as to a teacher)
El, Ella aprendio.......He, She, It learned
Past Tense Plural
Nosotros Aprendimos....We learned
Uds., Ellos, Ellas.............You all (Uds), They all learned
Once you lay out the verbs --ar, --er, --ir, in a spreadsheet and study the most commonly used tenses (present and past), then you can begin to see a pattern in the verb formations. The verb formations for regular Spanish verbs --ar, --er, --ir verbs all follow a distinct pattern. It's the irregular verbs that all get goofed up, the same as in English.
Want to learn future tense, quick and dirty? add "voy" from the verb infinitive ir (to go). Yo voy a aprender espanol. I am going to learn Spanish.
Immersion is the only way to go. PM me if you have interest in a school that will be starting immersion classes in a pueblo near Guadalajara.