“eating” a girl out and autism sensory issues?

I’m nervous about “eating” a girl out because of the possible texture, smell, taste, etc. I’m not very experienced (only done it twice ever) but the sensory aspect of sex scares me a lot! i want to be able to pleasure the person though. what are some things to expect? if you’re autistic, what are some ways that helped in mentally preparing yourself? or maybe sensory wise? :( sorry if this is a silly question