Yes, you can do this.
I did it myself.
Here is a list of things that helped me:
1) A good book of verbs
2) A good book of pronouns and prepositions
3) The book "Fluent Forever" by Gabriel Wyner has the best system for learning a new language
4) Movies & TV shows in Spanish (to train your ears on the sound and the rhythm)
6) Practice speaking with someone every day, even if it is only for 15 minutes
7) Create your own projects that use the language
I am happy to answer questions about it.