Hopefully you all added clover in your rye mix this year. Can mow the rye this spring going forward for a nice stand of clover. If not, frost seeding is a great option for: whites, reds, alsike, & "frosty Berseem or Frosty Balansa" (which those 2 annuals - before could not be frost seeded). Cannot frost seed regular: balansa, berseem, crimson, alfalfa & few others. See very heavy in February or March.
Some of my favorities (to some extent, splitting hairs)....
WHITES: Kopu II, Alice White, Ladino (many newer clovers are modified Ladino's), Durana, etc.
RED: Depends on what you want it for..... If plow down, get the cheapest and usually can find a plow down Red (for N creation going into something like brassicas) but if want for deer to leave it - the largest leaf red with least stem material is better.
ALSIKE: a lower priced, short lived clover that's great for wetter soils (so are white clovers but Alsike is BETTER than whites on wet soils).
ANNUALS or BI-ANNUALS.... Fast growing, high N fixation, cheaper but usually higher seed rate. Great for "cover crops" as they grow quicker (not as fast as oats) & great for a plow down creating a lot of N. Deer love them as well.
*buy innoculated seed or IDEALLY innoculate yourself. Not hard to do or inquire about. Especially on a new piece of ground that hasn't been worked before. Less critical on previously farmed land.
Late summer or fall ideal, frost seeding is also great, spring planting is doable as well - I'd do oats or an annual clover if possible as companion: seeding at higher rates.
Planting with rye mix, like in picture about a week or two after planting.... You likely will NOT see much for clover that fall. It will be next spring where you notice it. See below spring or early summer picture following here, clover you didn't realize was there - IT'S THERE!