New developer needs help.

hi all ! Im got my ABAP developer/consultant certification in November, sadly because of personal business reasons, I have not practice at all, and I think the best way to dont forget what I learned is to practice by myself until I get a job as a developer.

So my first question is. What do I need to download to develop & test some self made programs / procedures in ABAP.

Any other recomendations that you have will be welcome.

Thanks a lot !