I use the Mach3 by itself, I shave in the shower with just regular soap then do a touch up of anything I missed in the mirror afterwards, less cleanup that way.
I thought the question was about actual "straight razors" though, they actually make disposable ones, hair dressers/barbers use them for sanitary reasons.
Funny that.
I also use the Mach 3, have done for ages.
I also use a shaving gel when I shave.
The one big thing is to make sure the razor is *sharp* and to take your time.
I tend to ignore the 'blue strip' on my Mach 3 and change the head every 3rd or 4th day.
Since you have just started shaving, don't stress over it, it won't be the end of the world if you don't get it right the first time and eventually you will find a way that works for you.
Lastly, the 'smooth as a babies bottom' shave is not doable all of the time, it's a nice ideal to have tho and is normally only something you can aspire to after not shaving for a couple of days.
