Welcome! Most agents fail and switch careers within a year or two of starting, because they aren't prepared beforehand financially and don't have a realistic plan for the immediate future. I've been practicing in SoCal for over 10 years and I've seen so many agents come and go. The ones that stick with it and have a fruitful career as an agent tend to have similar qualities.
First, they have financial backup from the start. DO NOT start practicing real estate with only a thousand bucks in the bank! You may not close a deal and get paid for a few months when you first start, maybe a handful of months. Basically, I wouldn't recommend full time practice unless you have about 4 or 5 months worth of money to pay your rent and live on, because there's a good chance you'll need it. It takes many people a year or two to get a steady stream of clients, so that first year or two is when most agents fall out of the business due to lack of funds.
Second, have a plan. Starting out is tough, so be prepared. Consider brokerages that cater to training newbies and providing leads, as opposed to small boutique brokerages that may give you a better commission split. Take less than a 50% split if you need to, it's worth it for the right brokerage and leads starting out. ALSO I'd highly consider asking some busy agents in town if they could use a "co-agent" where you can do a lot of the busy work for them for a split of what commission THEY get after splitting it with their broker. Network with high volume agents - sometimes they will hand off listings to you that they don't have the time/energy to list themselves (I do this with a new agent I recently met, I hand off my "headache" listings to her if the seller is ok with it). Finally, consider lead generation, but do your due diligence before spending much money on it. I used Zillow lead gen during my first year, and although I would never do it now (its like 30 **** leads per actual serious lead, and there's no way I would have the time for that nowadays) it did definitely help me get my first few closings.
Hope this helps a little. Good luck!