US Trademark, California Corporation and Starting a Business Question?

I am planning to file a California corporation and a US trademark.However, I’m not sure what to do and in what order. Here’s my tasks and some background info:-I am forming a direct response company for 3 very different product lines.-I will be getting some products from China and some I will develop here in California which I will be marketing/selling. The Chinese product source is secured (it’s my colleague in China).-I must form a US trademark for the China product lines.-I want to put all of this under a single corporation-I haven’t started the business yet (ZERO has been done)What should I do and in what order?I’m also wondering how long will all of this take (forming the business, corporation, and trademark)