I would not attempt it the job requires specialized tools you will need to rent or buy them. You will need seal puller and driver.
Just to make sure we are talking about
JUST axle seals on a straight axle car (not IRS).
Not wanting to start a flame or disrespect but I done a few in my drive way. Ok, I do have a seal puller. But if you are careful, a junk screw driver works.
For a seal driver, a block of wood is the weapon of choice.
I completely agree that often it is better practice to change the axle bearings at the same time. True a specialized slide hammer is needed (which can be rented). There have been times I thought my hand would fall off before the blasted bearings came out.
Now it's true. I do have a cheap Harborfreight bearing/seal driver, but a socket will work. Let's not forget that a seal driver is a tool that can be rented.
Personally, I use a torque wrench as well. However, I remember being flamed by some of the pros as it being over kill.
+100 regarding working on your DD. Can't say it enough. Do your home work. Understand the job. Have a plan. Have a backup plan. Give yourself plenty of time. Line up the supplies ahead of time. Take pictures.
Having a back up plan is just plain smart. An example of a back up plan could be as simple as using a friend's car if the job turns bad.
Having said all that, it is still up to each individual to decide DIY or professional. But isn't that why ppl post here?