^ OP I think why nobody is taking your thread too seriously is (a) there's a Ketamine IM Sub-Thread, which you should have consulted, (b) IM injection is a wonderfully simple affair, and even a quick google search of "IM injection" will give you all the information needed.
Let's go over it slowly, one last time, step by step:
1) You purchase large-bore sterile syringes. I use 5cc syringes and they leave no bruising or soreness.
2) You extract a chosen amount of ketamine from the vial into the barrel, making sure the needle doesn't touch anything. Given your tolerance, I would start at 100mg and slowly work your way up from there - the difference between 100 and 150 IM for me was astounding, and I can snort a gram and a half in a couple of hours. The trip comes on hard and so fast your brain doesn't have time to get the "aaahh yes i'm slipping" feeling. You'll be sober, you'll feel a bit woozy for a couple of minutes, smile, and then BLAM! You're grappling with Darth Vader deep inside the Death Star.
3) You use a disinfectant swab to clean the area you want to use. In my experience, the upper thigh gives less chance of next-day muscle soreness.
4) You push the needle about 3/4 of an inch deep into the muscle. You'll notice pricking the skin hurts, but once you're past that, the muscle is largely insensitive.
5) (MOST IMPORTANT): Inject very, very slowly. About 1ml every 30 seconds. You'll notice from the pain if you do it too fast.
Be sure the muscle is completely relaxed.
6) Extract syringe, swab area once again, and make sure not to tense or move the injected muscle for 5-10 minutes, otherwise you'll have sore muscles the next day.
Enjoy your vials, I am green with envy, you fuck.