What precautions are needed for post-laser hair removal care?

Since I wear long sleeves these days, I'm thinking about getting laser hair removal from my shoulders to my hands.

I decided to write this because the clothes are long and it seems like it would be relatively easy to manage after laser hair removal.

However, since laser hair removal treatment must be performed several times according to the hair growth cycle,

I would like to ask you a question about post-treatment care for laser hair removal, from before to after the procedure.

Arms and hands are parts that are not completely exposed and move a lot in daily life, such as brushing against each other, so I think there are special precautions to be taken.

Immediately after the procedure, reactions such as skin redness or slight swelling may occur. How should I care for these initial reactions after laser hair removal?
Is it good to use a cold compress, should I apply a soothing cream, and when can I shower or bathe the treated area?

Also, is it helpful to apply body lotion or moisturizer to the area on the day of the procedure or the next day for post-laser hair removal care? Is it helpful to apply sunscreen immediately after the procedure for post-laser hair removal care?

Or, I would also like to know if the sunscreen ingredients can actually cause irritation.

I want to know what actions to avoid to maintain my skin without side effects until the next hair removal procedure, such as forcibly plucking hair or exfoliating, and I want to achieve satisfactory hair removal results.