Very cute! Added to my liked patterns. There are seamed patterns out there, I'm exaggerating a little, but they're definitely far, far outnumbered by circular sweaters.
This is why I design my own patterns a lot of the time. The Knitter's Handy Book of Sweater Patterns is really, well, handy for this, since it breaks a lot of the math down for you based on gauge. If you want a design feature like a puffed sleeve or something you have to futz with it, but it's a good starting point.
Your sweater looks very nice and fits well, but if you want to have it go easier next time, try The Knitter's Handy Book of Sweater Patterns: Basic Designs in Multiple Sizes and Gauges. I’ve knitted hats, mittens, and gloves using a different book in the series, but I’m referencing that one for my next cardigan, the first of my own design, mostly because I can’t find the right free pattern for my latest Ice Yarns bargain.
I just looked at the pattern again and realized that row gauge is important. If you follow it as written without adding rows, it with be too short. I suggest you might want to buy a nice used copy of The Knitter's Handy Book of Sweater Patterns: Basic Designs in Multiple Sizes and Gauges. You can make sweaters in different sizes and gauges.
It's basically the height and width of a knit stitch and the height and width of the intended garment. The former depends on yarn, needles, knitter and even knitter's mood. Looking at a pattern that has a good schematic will help with the latter.
Ann Budd's Knitter's Handy Book Of Sweater Pattern: Basic Designs in Multiple Sizes and Gauges may give you some answers if you can borrow it from a library (or buy it). She has tables of measurements.
Ann Budd's book - Knitter's handy book of sweater patterns! It does provide some patterns, but it primarily talks about design and how the patterns work. (She has a similar book for top-down sweaters, if you like those better!)
I'm going to second swatching it. The pattern should have a schematic of the blocked sweater so you can do some Fancy Math™ to figure out how many stitches you need to have for the size you're looking for. The armhole decreases on the sleeves and the body will need reworking as well, but you could probably use a resource like The Knitter's Handy Book of Sweater Patterns to help you with your calculations.
I found this book helpful way back when I had the bandwidth to think about construction outside patterns The Knitter's Handy Book of Sweater Patterns https://www.amazon.com/dp/1931499438/ref=cm_sw_r_cp_api_glt_fabc_P7GYMFYHQ6H53P49FJP4?_encoding=UTF8&psc=1
Strange Brew by tin can knits is a good base pattern for colorwork yolk sweaters. Also, books for how to design a sweater and good recipe type things with lots of different gauges and sizes. Here is one I have and like
I’m going to try the raglan from The Knitters Handy Book of Sweaters for the first time. The book might be worth a look from your local library. I also have a copy of Knitter's Handy Book of Top-Down Sweaters: Basic Designs in Multiple Sizes and Gauges but it’s a more complicated method, but worth a look if you can check it out of the library.
I recommend these two books
The Knitter's Handy Book of... https://www.amazon.com/dp/1931499438?ref=ppx_pop_mob_ap_share
Vogue® Knitting The Ultimate... https://www.amazon.com/dp/1942021690?ref=ppx_pop_mob_ap_share