Oh good...more people making "the QUILT"!! sewNso..you'll do fine. There are a couple more people who are just starting theirs too.
A tip for adjusting the tri in the software....click on the box that says "size from quilt" before you print your pattern. That will make it the 8 x 5 that you need to go with the 4" blocks.
Above all...it is frustrating at times...but its also fun and just look at the beauty you end up with when you finish!