2 word for you

GOOD LUCK

you need to have plenty of consideration taken in mind, such as
1) damage the parts carelessly
2) missing parts by human factor (maybe your dog carry away or you mistakenly took it away or throw it away)
3) wrongly assemble and damage the body or parts
so what is your contingency if above happen in the degree of seriousness either its low or high
put away the money first, can you handle the situation above?
will it be where you damage those parts to the level that you need to spent a lot to cover back your mistake?

there are reason why engaging installation service from ikea is expensive because they know every detail well and they have the skill to assemble and resemble everything from 0 to 100 and 100 to 0 which is something not under your knowledge or will spent you plenty of time and effort to just get from 0-50

so good luck is the best advise to you if you insists to do it yourself