This pattern is categorized as Beginner Friendly using mainly the Puff Stitch. Pattern is in English in US terms.

MAJOR STASH BUSTER: These are pretty big in comparison to a lot of other crocheted pumpkins out there. Sizes vary a lot from person to person, but the designer’s finished pieces measured about:
Mini: 3.5 inches in diameter
Small: 4.5 inches in diameter
Medium: 5 inches in diameter
Large: 6 inches in diameter

Materials
G Hook (4.00 mm)
Tapestry Needle
4 skeins of any Weight 4 yarn-
Large Pumpkin: (150 yds)
Medium Pumpkin (130 yds)
Small Pumpkin (110 yds)
Mini Pumpkin (70 yds)
Small amount of Brown yarn (If crocheting the stems)
Polyfil
Sticks (Cinnamon sticks, Corks, Branches etc.)
Glue (if using a stick)
Extra decorations (optional)

Stitches and Abbreviations (definitions are provided in the pattern for the number of loops in my puff stitch):
MR- Magic Ring
ss- Slip Stitch
Puff- Puff Stitch
Puff inc- Puff Stitch Increase
Puff dec- Puff Stitch Decrease
BLO- Work stitches into the back loop only.
FO- Fasten Off