Quicken Deluxe program question

I hope someone can give me the simple answer to this.........and I'm positive there IS one, it's just I'm a beginning newbie user of Quicken.

I decided to try recordkeeping on my own this year, and am just starting entering........(ok, no cheap shots here and dissing on me about starting earlier. I'm doing what I can.) It was determined that Quicken would be the best application for my needs. Yesterday I FINALLY got to sit down with a reasonably clear head and start entering my checks from the bank statements. (my bank is still in the stone age and their statements can only be downloaded into Microsoft money). I "forgot" about putting in the beginning bank balance before entering the checks. I need to know how I can go back and put that in.

And, when I start the next month's statements.............do I just continue on without a break with entering, or can I (how can I??) start a new month...........and is the program going to go ballistic because in the Feb. statement there are obviously checks from January in there.

I hope I have explained this clearly as to what I want to know. If anyone has answers, remember I am quite simple in the brain in regards to some respects (oh, who am I trying to kid.......ALL respects) so I need to have it in words of 4 letters or less. LOLOL

Many thanks.