I rent out an in-law apartment behind my house, a duplex down the street, and have been renting out a furnished house (while an estate finishes settling) across town. I'm in Berkeley which contrary to popular opinion, makes it easy.
I've been a stay at-home mom during all this, and it's made me feel much more like a support of the family.
It isn't an unbearable amount of work, rather intense periods once in a while.
If you are going to be nearby I would say absolutely Do Not deal through an intermediary: you want to be the one making the decisions.
First: get the Nolo Press book on being a landlord. It will run you through much more of the basic law than you will ever need. And it will have blank forms for leases.
Second: look up on Craigslist for equivalent rentals to what you are offering. This will give you an idea of what the market will bear. While you want to cover all the expenses of the house, you need to ask for about what other people are asking if you want to rent it out.
Third: you need to think through, clearly, what you are looking for in a tenant. This isn't necessarily obvious.
For example, for your first tenant you may not want someone who wants to settle in forever, since your own move is an experiment and you might change your mind. And, you may want to think about why someone is looking to rent in your area. As I said, I am in Berkeley, and near the campus, so students and campus workers are likely. Worst tenant (hey, my husband did the interviewing) was a lawyer and family. Warning should have been: what is a mid-career lawyer doing not already owning his own place? (Answer, he was screaming loony). But - importantly - he was outside of my normal tenant profile. (An important point, though, the majority of tenants over the years have been nifty people I've been happy to deal with.) Bottom line? Be picky. Use your instinct. Have an application form of your own - modify whatever Nolo suggests with your own concerns. And stick to your own rules! If you have decided No Dogs, people should respect that: if they start off wanting to bend rules, it's only going to get worse over time. Oh and - important - STAY LEGAL. Show the house to everyone, and keep your mouth zipped. It is illegal to not rent to folks with children, to discriminate on about any basis you can think of, and so on. So show the place to anyone who asks, and don't discuss any reasons for why you make decisions. Which reminds me - umbrella insurance!
Fourth. Not having an agent means they phone you if the drain stops up. No biggie. It also means you come by with the plumber, because it gives you a non-creepy excuse for coming by the house. You do want to do this from time to time, just to make sure the walls are still there. (Just joking!) But do make sure you tell them to tell you as soon as anything breaks.
Fifth. Figure out the finances as best you can before you start: property tax, mortgage, and a repairs fund, all have to go somewhere to wait. Move utilities into tenant's name immediately. Decide whether they keep up the yard or you hire a service. Bear in mind that if you hire a service, it is a tax deduction. Which leads me to
Sixth. Talk to your tax person. Depreciation is your friend! It makes a huge whopping difference on your tax burden. Also, home repairs are also now tax deductions as a business expense, as long as you don't live there over a certain percentage of the year.
Seventh. Even the best tenant breaks things, and sometimes things just die. Don't leave anything you care about, in an irreplaceable sort of way, on the property.
Eighth. You are not alone. In Berkeley and in San Francisco there are Rent Boards, and I have gone to them multiple times for advice. They have always been very helpful, even when it's been something not quite part of their mission. There are also landlord associations, but they've always seemed a bit too politically regressive to me. (I'm just wanting advice on handling a security deposit return when one of three kids is leaving, but they are raving on and on about killing rent control. Not helpful.)