↪ When you are starting any business, you should do a Trademark Research, Copyright Research and Online Presence Research before finalising what your Brand is going to be. And that's... easy to preach, tough to carry out.
If you are a local business, or if you are working offline, it won't matter. But seriously, do you want to never appear in the web search results? Are you never going to expand your horizons? Is that a healthy favourable scenario? Think about it.
Changing your brand name later is always possible, but with some extra effort from the starting point, you are avoiding the trouble of rebranding in the future. You can check the availability of your brand by simply search the web with the right question. Alternatively, you can ask a lawyer friend for some wisdom. They are more qualified, and hopefully, honest friends.
Each country has a process through which anyone can register for the Copyrights and Trademarks. Patents are even cooler. I don't know why the Intellectual Property Rights are not a compulsory subject early on, in the schooling systems.
If you think that using a randomly arranged group of letters and numbers will be a safe option, kindly perform quick search first. I was shocked to how even the most unlikely alphanumerical words end up being some actual organisation's brand identity. You know the life wisdom, right? NEVER underestimate the power of coincidences.
There is no need to worry too much, because the other aspects of your business would deserve a lot of attention as well. Therefore, being careful with your brand name is recommended, but it shouldn't become a distraction.
All the best with your name-experimentations. See ya.