What is X-shape stitch/V-shape stitch? Which one is better?
X-shape stitch or V-shape stitch depends on the way you pull the yarn through the loop. If you yarn over the hook from back to front, you’re making a V-shape stitch. If you yarn under the hook, then it’s a X-shape stitch. Both ways are fine, you can crochet whichever you find easier.
V-shape stitch helps your amigurumi look bigger, while X-shape stitch makes your amigurumi more beautiful and helps to make the amigurumi tighter.
X-shape stitch

V-shape stitch

X-shape stitch

V-shape stitch

Right side vs wrong side? Which one is correct?
You can see the difference between the right side and wrong side in the photos bellow.
When you crochet mini-sized toys/dolls, it is unable to turn the sides. Therefore, it is normal having the wrong side out.
Right side

Wrong side

Hide the yarn
For the remaining yarn, you can use a tapestry needle and weave it vertically through stitches. Repeat a couple times to make sure it stays firmly.
Use the tapestry needle

Weave the yarn vertically through some stitches

Repeat a couple times

How to count stitches?
Do not count the stitch on the hook.
Counting on magic ring

Counting on foundation chain

Chain 6, start from 2nd chain on the hook
For the oval shapes ( arms and legs parts of this book)
Chain 6
Start from the 5th stitch
Follow the instruction

On last chain, we often crochet three stiches
Continue crochet on other side
We finish the 1st rnd

How to change the yarn color correctly?
Before changing the yarn color, there are two loops on the hook.
Take the yarn (you want to change) through both loop.
Change the color as instructed.

Invisible Decrease
Normal decrease (photo bellow) will make a large hole, so we should use insivible decrease. Just crochet on front loop only.
Normal decrease
Crochet on front loop only
Pull the yarn through two front loops

Weave in the remaining 6 sts on the last rnd
After you finish crochet
Use a tapestry needle and weave over remaining sts.
Pull the yarn to close and hide the remaining yarn.

Finishing
There are a loop like photo bellow
Pull the yarn through last stitch
