Alright, i'm getting a Bass Guitar for Christmas and i have some questions regarding playing, what i need, etc. Ill make it nice and simple in a list: 1. I have clubbed thumbs, will this affect my playability? I understand a lot of Bassists use they're thumbs to play, and i'm not sure if ill do it as good.. 2. Does the Bass size ABSOLUTELY matter? I'm 13, can i just buy a full size bass? I'm going to grow into one eventually anyway.. 3. Personally, i'm crazy about Semi-Hollow Basses, they look stunning and they sound pretty nice too, thing is, i cant find any that are recommended or cheap enough for me to save up for if i decide on to buy one in the future. What is the key difference from a Semi-Hollow and a plain solid body? And are they good for beginners? 4. I'm used to reading treble clef in mostly everything, I have two acoustic guitars, but i am just horrible at playing chords and things like that and i really don't like them anyway. I mostly play Violin, Viola, Tenor Saxophone, Autoharp, Piano. (yeah, i dont read Bass clef, i just play my songs on Piano and Autoharp by ear, same with Viola.) I want to become a dedicated Bassist, will it be harder to learn Bass clef? 5. Are these off brands really not that good? I just want a cheap beginner one to start with, nothing too fancy, nothing professional, just something that will work for a while until i get good. I know what to look for in a Bass, and i know what i want, but can i start with something plainly on Ebay for $100-$150? 6. Does the Amp matter? BIG question. I play Electric Violin and i use a electric guitar amp for that, a Yamaha GA-10. Will i need to buy a special amp JUST for my Bass? I don't want something to expensive or big, just something loud and useful enough for me to play in my bedroom when i want to practice.