With just a nav radio you have a couple of options. The easiest one, and what I generally mostly do on these flights, is precisely that: go VOR to VOR, tracking a given radial in, then switching over to an outbound radial just before you pass (to avoid overshooting and correcting). At that point you can either track the outbound radial on that one VOR, or you can tune the new one if it’s already receivable; or you can wait until you’re a bit further on the outbound to pick it up.
A rather annoying alternative, if you really have to, is to fly to an intersection of two different VOR radials. This is trivial when you have two radios and you can tune one on each. If you only have the one radio you can still do this, but it takes a bit more finesse. You need to track the radial you’re on until you think you’re in the right area – doing a bit of flight planning so you know distance and, with your cruise speed, about how long that will take, is very useful here. Then you hold your current heading, tune in the new VOR, set your radial, and wait until the CDI hits zero.
There’s also the presence of NDBs which you can use to your advantage. You can’t select a radial to fly to on an NDB, but you can do some planning and figure out what the bearing to the NDB will be when you reach the intended point on the VOR radial. Then you tune the NDB on your ADF radio and watch the bearing pointer on it as you’re flying along your radial until it points to the relative bearing you had planned.
All that said… as GPS navigation gets more pervasive, an increasing number of radio beacons are being taken off line, meaning it’s harder to do this sort of thing because you have fewer known reference points. NDBs are almost extinct in some areas. Given that, I do, as I noted, allow myself on a plane like this to have a DME; it doesn’t feel like cheating so much as making up for the context lost by radio beacons going away that you would have had when it was “new”. VOR radial + DME distance is not much different from going to a VOR/VOR intersection with an imaginary VOR. :)
Some folks will think that’s “cheating” if you’re trying to use only what the plane has, but that’s cool. We all define our own fun and relative challenges.
Hopefully that helps a bit? I’m happy to explain more or make some suggestions for radio nav tutorials if you’d like. I don’t want to go over peoples heads but I don’t want to “sim-splain” either. :D
MSFS is good enough in the scenery department that dead reckoning and visual waypoint finding is totally doable in a lot of places. There are lots of VFR charts you can find online, including pretty much the entire continental US via the FAA. (You can also use them as a layer in SkyVector, or the add-on maps for LNM for planning, even if you don’t use them as a magic GPS to track your flight.)
It very much is. One of my favorite things to do in the sim when I want a challenge. :)