Just my personal opinion and that is what I did. The sensor isn't that easy to scratch if you don't use something hard. It is no different from cleaning your lens except this is inside your camera and more difficult to clean.
Ultimately, you will need to clean that sensor even if you don't change lens. Dust will get in, unless you don't use that camera. So, it is better to learn how to clean that sensor.
What kind of cleaning kit? The expensive ones would be great but not necessarily you need the most expensive kit. As I have said earlier, no different from cleaning your lens. Start with your lens then move to sensor. Don't panic if you did not get it right the first time. You can do it a thousand times to get it right. Nothing will happen to that sensor unless you try something funny. Last resort, bring to the service centre. That cost to clean is not going to be more expensive than before you trying cleaning yourself.
Good of luck and watch as many YouTube on how to clean that sensor before you start.