I continue to learn Spanish and will forever continue to make mistakes but I am ok with that. Over the years, a couple strategies helped me learn and improve.
One is to consult a 'verb conjugator', now easily accessible online with a very good one available free at WordReference at
https://www.wordreference.com/conj/EsVerbs.aspx. It uses the 3 verbs ( Amar, Temer, and Partir ) as the model verb to follow for all regular 'AR' , 'ER', and 'IR' verbs, plus you can use the search function to see other regular and irregular verbs. For each verb, it displays a whole page with all the tenses and associated conjugations, so at a glance you can see and learn the patterns across tenses and across verbs. It has the participles, gerends, as well.
The second strategy was to start to read 'easy spanish literature', and I started with Reader's Digest' in Spanish call ' Selecciones Reader's Digest'. The vast majority of its content is very very short in length, using everyday language, with a wide variety of generally non-serious topics, even jokes, games, riddles and recipes etc., so you will see language used in a variety of real-life contexts. It helped me to see language patterns, sentence structure, learn vocabulary, verb conjugation, spelling, phrases, idioms, local sayings, and more. With each article / piece so short, it is not a big commitment nor a burden. Digital copy is now available too, but using hard copy allowed me to scribble in the margins, to refer back to it sometimes; you can even read out loud to yourself, and practice your pronunciation. If not this than any other magazine would do. Of course you will see regional language differences, Latin American vs Castellano etc, but it gets you further with it than without.
Hope some of you find this helpful. Buena suerte a todos!!