Some guys do it themselves, but for me it is well worth the $20 to have someone do it for me. See if there is local independent shop that works on dirt bikes. They will likely be cheaper than Cycle Gear or a dealer.
I will second TW Brian. I’m not as well versed as some in such an endeavor, nor do I have much of an appetite for it, so I pay someone to swap my tires rather than doing it myself. I am fortunate enough to have a local auto mechanic in my neighborhood who also rides and enjoys working on my bikes.
I can show you how to change your tires if you can wait until next weekend. It is good to learn and they are quite easy to do. Front or back or both needing to be replaced? I'm in Caldwell. I have a lift that makes it easy.