Downloading and using Bitcoin Core is free. However, be aware that this installation will cost you time, bandwidth, and a significant storage space. Installation involves downloading the entire Bitcoin blockchain. So make sure you have at least about 210 gigabytes of free space. It is not a problem to install Bitcoin Core as a beginner in cryptocurrencies. On the other hand, it is rather advisable to have a good computer background to be comfortable both during installation and when using the software. If you are new to crypto and IT, installing Bitcoin Core may not be the most suitable wallet for you.
On the other hand, if you have computer knowledge and want to actively participate in the Bitcoin ecosystem, know that you can help strengthen the network by leaving your computer on with Bitcoin Core and port 8333 open. This is undoubtedly one of the big advantages of using Bitcoin Core.