Of course you can do your own nails, but please dont expect professionals to give you advice on how to do them. We dont want to be blamed for you doing something that results in damage to yourself. Especially if you are using products brought from ebay.
We are more than willing to help a nail technician in training as that is what the site is here for, but on principle we will not advise a consumer on how to do their own nails. A trainee technician has knowledge of what we are talking about, a consumer does not.
A consumer can ask advice on what standards to look for in finding a technician, but we will not give a consumer advice on how to do their own nails.