I'm too far away to help and there are different ways to clip the spurs. Some people use dog nail clippers. I use a Dremel tool with one of those discs you use to cut metal. You have a good reason to trim those spurs.
The quick does not grow all the way to the end of the spur. It grows differently in different roosters. Usually you are real safe if you only take off 1/4 of the length, a lot of the time You can take 1/3 off without issues. With some spurs you can see the quick in the spur but usually you cannot. Have some flour handy in case you do get some bleeding but it is not that big if a deal if you do. I've drawn blood before and the rooster didn't even flinch. And the bleeding usually stops on its own pretty quickly but have flour handy.
If you can get someone to help that would be great but I do it on my own. I wrap the rooster around the wings and body with a large towel, you can use a blanket. I do not cover the head but you can if you wish. I lay him on his back and he normally remains really calm. I hold onto the legs and carefully clip the spur off, it is really quick. Then I turn him loose with his flock. Mine typically immediately mate with a hen to say I'm back and I'm still the boss. Does not seem to bother them.
I wish you luck in getting someone nearby to help. If you can, you might edit this thread title to include your location to to attract local people. Or if you can find your state thread in the "Where am I? Where are you!" you might chat with your neighbors. It's something you can do yourself but it really helps your self confidence if you have help the first time.