In my opinion, LSD is a great substance to start with. Just cut your blotter in half and take half man, or if your very scared just take 2/5 th of a blotter and the rest next weekend to get a feel for it. LSD is a very user controllable trip IMO and is easy to dose regulate.
First time I was going to take LSD I said I`d take half, then ended up taking 5/6th of it and the rest in 2 hours. I did not regret it at all and laughed all the way. I was alone too!
An important bit of advice is not to underestimate half a blotter of LSD, but rather respect it.
Unless your really not one for psychedelics, and by that I mean the worst person to take it, 1/2 blotter and nothing will go wrong IMO. But taking LSD is never safe as they say (bunch of bullshitters they are)