Buy a PC and save yourself a lot of dough. easy and cheap to upgrade and to troubleshoot.

Thats a great advice! What gear would recommend for someone who is starting out but wants to make money ?

First advice is stop using F word and show good manners. Second advice is to keep your job and then read a book on how to manage your free time effectively. At 21 years of age you do not really know much about life and your films will show that. Keep shooting shorts but also try to read as many books (classic books especially Dickens, Tolstoy) and study lives of other people (biography). Look for stories that have a deep meaning or a good resemblance of reality. Only very few make it in film industry and just because you love doing it won't guarantee you will be always in demand. This means you will need a plan B. As others mentioned, life is not about doing only what you like. It is quite the opposite. Take it slow and have patience. You may feel that you need to drop everything and "do what your love." But do not rush to quick decisions or trust your initial thoughts because they maybe misleading.

Is it necessary to get speed booster to achieve shallow depth of field with this camera? Can you recommend a good zoom lens for GH4? thanks!