There are folk guitars, classical guitars, and electric guitars. There are many types of choices. The guitar is dominated by 6-day strings (also 4-5-6-7-8, etc. 12), and most of them are 6 strings.
The average guitar size is 34-36-38-40-41, the most common 40-41 size, 34-36-38 is generally children's guitar, travel guitar and so on. The 6 strings will have a lot of fingering, the fingerboard is wider and longer, and the taste is more and bigger. After comparing Ukulele, it will be harder to get started than Ukulele.