You are much better off buying grafted citrus as it bears in 1-2 years and
seedlings may take 5 years or more. Don't let the seeds dry out, germinate
like any other seed. Grow in a pot for a year and then plant outside. Be
careful about soil being well drained. The seeds a touchy about damping off.
If you bank your trees with dirt to above the graft, they will come back from
a bad freeze from the graft or roots(seedling). If you don't, they might not.
Phil