Sooner or later, everyone learning English has to learn the Irregular Verbs.
Here you have several links to help you.
1. A list of all irregular verbs grouped in a way that makes it easier to learn them.
2. A flash card solution with most of the verbs you need to know. Here there are 10 verbs to learn. You can find the rest here. You need to scroll down. It's after exercise 37.
3. A game of Snakes & Ladders to practice the verbs you learn.