Seal it and coat with clear.
After the alder is sealed tint the next few clear coats lighter than your final desired color and add tinted coats to get to the desired color.
Add additional clear over the tinted coats.
Alder does not accept dye well and you will likely have a blotchy dye job.
+1. Your first inquiry is whether or not the species of wood behaves well when applying dye. If it's a particularly beautiful, stain-friendly wood like mahogany or figured maple then it will come to life with the stain applied to bare wood. But pine or alder, fuggedaboutit.
It may soak in so unevenly that it looks dirty or smudged in some areas (affectionately known as "blotching."). So don't do it. At least not by soaking the dye into the bare wood. Many, many finishes (especially most factory made furniture) rely on the topcoat to apply color without trying to get it into the wood.
Rather, if you seal the wood with either a sanding sealer or a coat or two of clear lacquer, you can then make up your "toner" coats by mixing the dye into the lacquer. You spray light coats until you sneak up on the amount of color coverage you want. This technique also permits you to experiment with pigment instead of dye (Mixol is a good product to add to clearcoats); even with pigment it won't be opaque until you really add a lot of it (in fact if you want an opaque color start with a solid white base and add color, adding pigment to clear will give you a translucent coating). Remember the particles in pigment are so tiny they're smaller than pixels, so you're not "obscuring" the wood grain believe me. it's only when you use too much pigment that you might get things looking a little muddy, but that's where the hype about dye stain comes from.
Then when you're happy with that you can start with clear. The first topcoat of clear should be very light just to lock things in (the dye may otherwise try to bleed up into a fully we clearcoat). Then cover it with enough clear so you can wetsand and buff when it's cured.