I am a spanish learner and I figured out that I really need to learn the verbs. Is there a good (preferably online) resource with let's say the 100 most common verbs and conjugation to get me started.
Well the most important verbs in Spanish may be:
A quick search in google gives this link 1 which states to give the list of the 100 most used verbs in Spanish. The verbs included are very common, but it's difficult to say if they are the most common or not. Anyway I'd point out that important verbs like these ones are missing in that list:
These 3 verbs though are not included in the previous link are basic for Spanish.
If you want to see the conjugation of any of those verbs you can go to the website of RAE (the official institution for the Spanish language). You can go to that link and put the verb in the box which is called "Diccionario de la lengua española". After pressing "enter" you'll be given the definition of the verb and before the verb there is a button called "Conjugar". If you press it you'll see the conjugation of that verb.
RAE also has some lists of most frequent words here, but they are not only verbs.