Before you even think about picking up a needle, try snorting or plugging these. Much better BA than oral from what I understand (it's been a while but I remember enjoying the intranasal buzz).
If you're worried about killing yourself because you've never IV'd these before, well, you probably will... If you can't find someone you trust and respect irl to help you do this who already knows how to properly prepare such shit, forget it.
Probably gonna get closed, like yesterday, but there is a great resource out there for IDU (injection drug users) called "Getting Off Right" which is what you want. Frankly, you're better off avoiding the needle - IV or IM pills is EXTREMELY dangerous (see case study thread). Regarding the points, depends what state you live in (some have needle exchanges that are great, others such orgs are illegal; some states you can buy needles over the counter, others no - google is your friend here).
I think this is the best any of us can do for your here, short of yelling at you to not start using needles if you haven't already, and making sure you know how absolutely dangerous injecting pills are...:
If you insist on using a needle and going down a dark and potentially deadly road (at best - I mean, who likes getting limbs amputated?), read the following PDF (yes, every page). Hopefully though you're not so dependent you can't get a good buzz from sniffing these, so please for the love of all things euphoric try that first.
Getting Off Right
Snort or plug is much much much better an idea than IV/IM, because if you fuck up, and there's a really REALLY good chance you'll fuck up sooner or later, this is just the tip of the iceberg in terms of complications: