Be brave. A bottle of Eclipse fluid and a sensor swab and you are fine. Just remember dont reuse the swabs (some people say you can but personally I am scared to risk it). Couple drops of fluid on the swab, don't drown it. Don't tickle the sensor, don't scrub it. Nice positive motion once in one direction, flip the swab, once in the other direction. Bin the swab. Repeat as necessary. Use the right swab for the sensor size (just makes it easier)i.e. full frame on a full frame sensor, cropped on a cropped sensor and try not to pick up any gunk off the shutter mech. Sounds harder than it actually is. If you have a light tent - from product photography, do it in that to minimise airborne dust settling. It is daunting at first but you get confident after a few times.
Don't use:
1. One of those gel sticks -they can cause the sensor stack to de-laminate
2. A cheap butterfly brush - dust magnets in a bad way
3. A can of compressed air as the propellant leaves residue and the pressure of the air can cause damage
Let us know...
Oh yeah, I forgot what camera you have.... if it is a DSLR, DO NOT swab the focus screen. The focus screen is incredibly delicate and you will damage it if you fart near it never mind cleaning it.