I've been working as apprentice in a Software development company for 7 months now as a part timer. Now, the chief of staff wants to add me to the development team as a full timer. I made some calculations about the paycheck and the standard salary for someone starting in the company is slightly lower in amount of $/hours than the one I was being paid before. I really want to stay in this company for at least some more time but I don't want to be paid less than before (even if it's almost the same). I don't have experience negotiating and don't want to fuck up. Any tips about how to negotiate your salary?

What do you guys usually do when you have zero work assigned? Im on an internship in this company and I sometimes finish the work faster than they estimate so I find myself doing nothing for like 2-3 days. Any advice on what to do during this time?

Yesterday it was my first day at work ever. Basically I have no tasks yet, all I can do for now is look at other's code and figure out the basic of how their framework works. Is it usually like that?