A R89 is much less agressieve and will be more comfortable to shave with if you have sensitive skin or are prone to nicks and cuts.
Lots of people talk about how to achieve the greatest smoothness, don’t go for that if you regularly have razor burn. Just go with the grain and that’s it, no across or against the grain.
Also make sure to clean that razor (Of course I did so for the electric one I had, a pretty advanced Phillips one with great reviews), and use sharp blades. Typically changing blades after 5 shaves is a good practice, though a bit of a luxury. Razors themselves and blades both have different level of agressiveness, you might not find the best fit for the first attempt.
I have good experience with Feather, some Lord and Voskhod Teflon blades. Some others didn't work well, but settled on these as soon as I found one readily available and of a good fit for my skin.
I also have a Müle R89 razor that is said to be not agressive, and indeed it did work out well for me! Had some others before, cheaper ones (actualy the Mühle one is not expensive, just not dirt cheap, it will easily serve you your whole life), some were hard on my skin, with the exception of some very basic Lord one was pretty ok. Cannot name the model, bought it while travelling and was sold for a few bucks in a bazaar.
Also shave after shower, or use other techniques to soften your facial hair. (though most are really cumbersome, like using steamed towels) Shaving soap of cream alone is barely adequate in my opinion.
Also I’d say the razor burn and nicks are all down to technique, and perhaps skin/hair type. For me, even from the get go, the old school safety razors did not cause razor burn while the 3 to 5 bladed monstrosities always did because they results in a far to close shave.
Alternatively, you simply develop better technique without noticing. They are much closer so they are very sensitive to grain direction. I’ve found that I need to go with the grain, then sideways, and lastly against the grain in sensitive areas like the neck. And beard can grow in swirls, so grain is not always the direction you’d think. Secondly, warm clean skin and foam helps a lot to soften the hairs. Best would probably be in the shower but a hot towel before works too.
An electric razor is a good complement, and to be fair I use it more often. But that’s because I usually don’t care about the close shave. When I need make myself presentable I definitely prefer a proper razor, even when irregular.