I'll let others answer the rest of your questions since I do not have enough experience in the online freelancing field.If not, how can I find clients and start working?
You can start freelancing right now. Back in the days when Upwork or sites alike didn't exist, what would freelancers do ?
Find places where you can provide value
Look in cities around you for businesses that need some copywriting work. Contact them through phone, their website contact form, FB, any way you can. Show them you can bring value, and they won't care about your age.
Last edited: