I second the above comment that Pre-Calc was harder than Calc I. If you have the option, and the schools you're going to will accept it, you may consider Brief Calc. The one thing I wish someone would have told me before Calc I - brush up on your Trig before you go. (At least know the definition of sine, cosine, etc, and remember SOH CAH TOA.) Don't worry if other people seem to work with them much quicker than you do. I'm very slow at Trig (I didn't memorize shortcuts like other people), so I sometimes had to figure things out after class. Your teacher will be a valuable resource and will usually slow down and explain things to you when given an opportunity (such as an open-door office hour).
Just as an opinion on scheduling - if you can stomach it, try taking Bio I & Gen Chem I ASAP. You will need Organic Chem I & II, which has a prereq of Gen Chem I & II. Also, you will most likely need Microbiology as well as Anatomy & Physiology I & II, both of which have a prereq of Bio I where I'm going to school.
I would highly recommend looking at what schools you would potentially like to go to (are you going to apply to a local school? If not, do you have your eyes on another one?) and get a copy of their current Pre-pharm requirements. Also, figure out whether you are going to get through Pre-pharm in 2 years, or whether it will take longer (I work full time, so it's taking me several years to finish, as full time school isn't an option for me at this point - it will be when I get to Pharm school).
If your goal is to finish in two years, look to see what classes have prerequisites, then map them out that way. Ideally, you would take Gen Chem I -> Gen Chem II -> O Chem I -> O Chem II, as an example, and your Biology series concurrently. This will help you figure out how many classes you HAVE to take per semester to finish within your goal. Fill in your other classes around your sciences. A word of advice - I wouldn't try taking O Chem alongside Calc, so I would suggest getting Calc out of the way first year. Try the schedule for a semester and see if you can handle it.
Your academic advisor can also help you make a plan for your classes. Be sure to have the Pre-pharm requirements on hand when you walk in for your appointment, especially at a community college, as they will probably not know. If possible, figure out what the course equivalents are to your college, especially with out of state schools, before your appointment. The school you're looking to transfer to can be of help in figuring this out (since they will ultimately be the ones taking your credits).