1, I don't know the size of your hand, because after the age of 20, the bones are basically shaped, and playing the cello requires very flexible finger expansion. It might be better if you have a pair of big hands. Height is not a big problem. People over 1.60 need to play the 4/4 standard cello.

2, although beginners can buy electro-acoustic cello, but in order to restore the original sound of musical instruments, ordinary cello is better, and it is not too late to buy it when it is more basic. Of course, if you buy an electro-acoustic cello just to practice in silent mode, it is really useful. I don't know which model will suit you, because I haven't tried to play the electro-acoustic cello, but I heard that Yamaha's electro-acoustic instruments are all good. You can consider it.

3. The basic knowledge is the playing posture and position of the cello (this is especially important for the cello, so you must play it accurately). Pay attention to the powerful fingers of your left hand and try to relax your right hand, otherwise it will be very difficult to hold a long and large concert. Then play the empty string, and then those boring etudes, not impetuous practice is the key.

4. This is a matter of many things, mainly paying attention to cleaning and adjustment. Never leave rosin on the piano after playing, which will hurt the surface and strings of the piano. As for other matters, I suggest you buy a comprehensive copy of Music Encyclopedia-Cello imported from Shanghai Music Publishing House.

5, spare strings are to be bought, but at present I haven't seen any strings sold separately there, which are basically complete sets; Bows can generally be used, and be careful not to touch them with your fingers or anything greasy; Then you need rosin. There are not many kinds of rosin for cello in China, so some people will use ordinary rosin, but it will be better to specialize. There is also a cello box, unless you are really sure that this bag is strong, try to use a box instead of a bag; Question 2: If you buy an ordinary cello, you can also buy a silent one. There are many kinds, personally, ebony is the best. Andhadhun is also necessary, because the melody of cello is not as long and stable as that of piano.

6. I'm using Schroeder's cello basic etude 170 now, and I think it's very carefully edited. Every key point of the performance is emphasized, and there are some lyric songs to relieve boring exercises, which are very suitable for self-study. As for the Suzuki cello textbook, I haven't tried it. It may be very different from the former. I should ask the owner of the music bookstore.