My first few grows were in Ocean .. forest? anyway..
I did grow an auto or two in it. You will not need fertilizer for 6-8 weeks, unless heavily cut with perlite or anything else. OF is a "hot" soil and has tons of nutrients.
If you just started, like week 1, add some garden lime that will slowly work into the soil over time. not much - whatever instructions say per size of pot. You'll likely need the calcium the last 3-4 weeks. One way or another.. if you have cal-mag, use that conservatively early on.
Go really easy with FF nutes. Start at 1/4 to 1/2 strength and only 1 a week to start. I'd way for the faintest signs of deficiency before dosing your autoflower with FF. Take note of how long and be more proactive the next autoflower grow.
photos are less sensitive, if you ever run some of those, but you'll likely wait just as long before feeding, if in fresh OF soil from seed.
how much you transplant will matter too... Way too many variables to give a schedule.
Early on, you bearly water. If in a 'too large pot', then you have to be very careful not to drown it or cause rot while not letting large portions of the pot dry out.
So, stick to pH'd water for at least 3-4 weeks, but i'd suggest waiting for that hint of slow-down or a slight fade to a lower leaf that normally wouldn't occur etc, then start a regular feeding schedule. Start off easy, especially with an autoflower.
I had dark green leaves and a toxicity from FF OF and FF nutes and giving less than instructed every other feed or 1-2/week. I fertilized early in life too. That soil is rocking with nutrients, let the plant eat'em up first.
assume you know to learn the weight of the pot? Let top 1/2" to 1" of soil get dry before watering again. Learn the weight of it at each juncture. I'd guess 1/4strength ever third irrigation once it's time. Can always ramp up, but toxicities remain for a while.