Hello LilKitsuneLin! That is a lovely Adenium you got there. You got the right weather area to grow them, so what you can improve on is the media. Add more pumice or perlite to it, since it really needs to drain out faster. During this growing period it does like getting watered frequently like any typical tropical plant, but it will not like to be sitting in too much moist media. You are lucky you got rain, it will enjoy that. But like any other potted plant, if you do see you are getting torrential downpours, put in a protected bright area. Use a very well draining media and hopefully your container has drain holes and no rocks plugging the holes, so water drains out fast. The plant shows a nice caudex already, and continues on forming it below soil level, that is what you are trying to protect too from getting soggy and rotten by too much rain.
As mentioned by Kadie already, position in as much full sun, it can take it. It is one of my succulents that easily endures triple digits here.
Depending on your ambient temperatures during Fall, it may start to drop the leaves as it starts to do some dormancy. Well, it varies, some Adeniums may still hold on to their leaves but are technically dormant, or maybe holding on to their blooms but still dormant. So it is at that time that you have to gradually lessen watering, it is a natural phase it goes into. I do not know how cold your area goes, over here, if overnight temps starts going lower than 50F, I bring it indoors and have it positioned in my warmest, sunniest room and wait it out till mid Spring returns. Your growing area maybe better than mine allowing you to keep it outdoors longer. So just watch out if you get frost warnings later on, hide it indoors.
Spring and Summer is its happy growing period where it grows new leaves, new blooms, drinks a lot making that caudex fatso and firm.