Check out jordonfabrics.com She has tons of photos, free patterns and tutorials. Very helpful information, it's my go to website.

Great advice. Jordan fabrics has wonderful patterns and videos. Precuts are always perfectly cut without pinked edges.

ummm....you said you are just starting out....I would be tempted in purchasing something like a Accuquilt Go cutting machine and making my own strips. It is a big investment.....but.....It would be wonderful investment over years of quilting. I use my Go and 2.5 inch strip cutter all the time as I always bind my quilts with 2.5 inch binding. Jelly rolls are always a bit iffy to me as you don't exactly know how many of each fabric you will get and sometimes (OK often) they include big prints that really don't look that good in a 2.5 inch strip. Just a thought.

Those jelly rolls at Joann's you showed us only have 20 strips in a roll.

The pattern you show finishes at 14" per block. Of you want 5 blocks by 6 blocks - your quilt will end up with 70x84 ... Or just about a twin size and that's before you add borders.

I think going with the pattern on Jordan fabric is great cause it tells what you need exactly. You can get the jelly rolls there also.
Oh, and by the way, you are not am idiot. You will do great work.

sorry for the duplicate posts! I tried to edit and it wasn't showing it was posting. Yes, 3+ jelly rolls (assuming they are 40 pc but not equally divided dark/light). Do you have any left-over fabric you could mix in? Then you could probably get by with just 3 jelly rolls. But if you are doing 5x6 blocks that are 14" finished it would be 70x 84" quilt. So you'd probably need about 318" of binding, which means 8 strips from jelly roll minimum. If you decide to mix up the binding with light/dark you'd have to take into consideration losing 1/2" for each seam.
Welcome and I hope we haven't totally confused you with this!

You have 14” finished blocks, so a 4x5 set would finish at 56 x 70, a fine couch quilt. A 5x6 would be twin size. Let’s go with the 20 block set.
To get the most variation , cut all the jelly roll strips in half.
For your darks:
Select 20 , subcut each into one unit 2.5 x 14.5 and one unit 2.5 x 4.5.
Select 20, subcut each into one unit 2.5 x 12.5 and one unit 2.5 x 6.5
Select 20, subcut each into one unit 2.5 x 10.5 and one unit 2.5 x 8.5
Select 4 strips, 2.5 x 2.5 squares until you total 18.

For your lights:
Select 20, subcut each into one unit 2.5 x 12.5 and one unit 2.5 x 6.5
Select 20, subcut each into one 2.5 x 10.5 unit and one 2.5 x 8.5 unit
Select 4, subcut each into 4 units 2.5 x 4.5 and one 2.5 x 2.5 squares
Select 4, subcut each into 2 units 2.5 x 4.5 and 4 2.5 squares
Select 1, cut into 8 2.5x 2.5 squares. You will have 6 extra 2.5” squares

This would require 31 full dark strips and 25 full light strips, or 56 strips in all.
2 jelly rolls 40 or 42 strips

Niel, first of all Welcome to the board and to the beginning of an amazing journey with making quilts. I’ve only bought one of the jelly rolls from Joann fabrics but the quality wasn’t bad. I don’t know if you’ve ever heard of Eleanor Burns but she created the Quilt in a Day. She has a YouTube channel that teaches you how to make a log cabin quilt and a website where you can get really good buys on jelly rolls too. It’s too bad that you say you can’t cut your own fabric because then you could just buy a few yards of fabric and get a nice lap size quilt. Do you have any colors in mind for your quilt? Good luck with this venture and just know that we are all here to help you.

Math is NOT my strong suite, so I am no much help with how many you would need, but if you have a Tuesday Morning nearby (and the gods are smiling on you) you might be able to find some there. I have purchased both rolls and charm packs there, and have been happy with the quality.