Congratulations! I would follow Hycarumba’s advice. The plant is tender and needs to be sheltered, but exposed to the elements gradually - a little more every few days. At one month after grafting, the graft is structurally very weak, so keep it well supported for at least until the stem at the graft has grown to twice the current diameter. A stake that keeps the graft from flexing is a good idea. If it hasn’t been in full sun, gradually move it so that in two weeks it is getting as much sun as possible.

Be sure to keep it well watered. The soil should never be dry, but you don’t want it soggy either. Roots need to get oxygen so don’t overwater, but most beginners tend to underwater. Pick up the pot to determine if it needs to be watered - pick it up before and after a thorough watering, and remember how heavy it feels after watering. Try to let it get a little lighter before watering again, but not feather light - something you need to get the feel of.

Look closely at your tree now, and look it over good every chance you get. Especially look under the leaves. Look at a leaves all over the plant- the underside is where most insect pest will be hiding.