Which guitar is best for a beginner?

I have purchased a Squier Bullet Strat for a $100. at a Sam Ash store with the agreement that allows me to upgrade. There are many brands of guitars. This guitar was purchased so that I could see if I liked playing an electric guitar. I found that I do so now It is time to work. The sales people will just sell to make a sale. I need advice from you because your opinion comes from the love of the instrument.

I like playing the blues, Funk, Gospel and jazz. So I was looking for something that would work in that style of music with a budget of 300. – 400 range if that is possible.

Thanks