In reply to ride_998:
You will have to be prepared to work harder and longer (hours) than you are probably used to.
You have to do the jobs of about three people - whatever service you are offering; sales, marketing, publicity; secretary/accountant.
You have to keep good accounts: receipts for all legitimate business expenses, proper invoices for every job, and income/expenditure accounts (monthly spreadsheets).
You will have to spend a lot of time promoting/marketing yourself. A website will definitely help (depending on what you are doing).
Don't expect any great success overnight. It takes a long time to get established. Depending on how good your network of potential clients is already, it could take at least a year, possibly longer before you are earning a comfortable living/making an adequate profit. Every day you are not working halves the profit you made on a day you were working.
There is no safety net.
It is immensely satisfying if you are successful (i.e make a enough to live on, comfortably). You are your own master; you decide when and how you will work; when you take time off/holidays etc (very few in practice)
I've been freelance all my life, for 39 years.
Good luck.