Although not a “pro”, I have been getting electrolysis on my face done since April so I can share my experiences with you.
There is nothing you need to do to “prepare” before your treatments apart from drinking lots of fluid (James is a huge advocate of this) for at least several days prior to treatment. Avoid caffeine as this heightens sensitivity. I take a pain killer a couple of hours prior to sitting as I find this tends to dull the pain a little.
Your electrologist will prepare your skin so there is nothing you need to do in that department. However, avoid wearing makeup etc.
When you have finished your session, keep the area clean, makeup free and use Witch Hazel and Aloe Vera. I use a great aloe vera gel that dries on the skin and creates a barrier which prevents all the nasties from entering. It’s an Aussie one called Natural-Synergy Pure 98.6% Plus Gel by Chem-Care Pharmaceuticals. It’s also available on the net if you don’t live in Australia. James also advocates tea-tree so give it a shot.
Have a good read through this site and this forum about laser. Personally I am against laser as we do not know the side-effects and there have been varying results at best. It seems a waste of money for something which only says you’ll have a permanent reduction. Why risk your health when electrolysis is permanent removal and safe when done by an experienced practitioner. Proponents of laser usually have a financial stake in it.
Best of luck. Tell us of your progress and remember to take before & after shots!