I am level 1. If I were to level up right now, I would be at level 25. Unfortunately, I cannot level up to level 2, stop, then level up again when I am ready (which one of my only few beefs with this game).
I have no idea how I should allocate my points.
I know what most would say "If you want to be a caster, pump magicka. If you want to carry allot of weight and use mellee, pump stamina and health, etc.
It is more complicated than that.
Anyone remember the spell, "Fingers of the Mountain" in Oblivion? That spell was leveled to your character upon whenever you decided to take the quest.
If you were say, level 30 when you took the quest and picked up the spell, it required like 250 magicka to cast it. Once.
So in the long run, as huge as this game is, what is a suggested balance for points? I am a balanced character. I do not specialize in any particular skill. I enjoy casting, offensively, and defensively, archery, stealth, I love everything.
So how should I build these stats?
If you spread them all out as evenly as possible among magicka, health and stamina, you'd have two at 180 and one at 190. My first character is also a "balanced" one - she has a bit more magicka than she does the other two, but they're all fairly close to each other; Magicka is near 300 IIRC, the others in the low-to-mid 200's (she's Level 44). That's less any boosts given by enchanted apparel, blessings, etc.
What kind of gear (enchanted and otherwise), blessings and so forth do you favor? If you use something like the Archmage's Robes (+100 magicka) you might want to consider putting fewer points in magicka and spend them on health and stamina. Are you an OCD-type looter who doesn't want to bother with followers? If so you'd probably want to pump stamina for the extra carrying capacity. Are you planning to grind smithing/enchanting/alchemy and create armor with lots of damage resistance? Then it's probably not too important to put a bunch of points into health.
And so forth and so on. By Level 25, you should have a pretty good idea of what your favored play style is for this character, and plan things out accordingly. I'd suggest making a hard save, then allocate the points/perks and try things out for a bit. If you don't like it, you can always revert back to the save and try something else.
ETA - by keeping your level so low for so long, you haven't allowed enemies in the game to level up as you've played. You've probably also missed out on a fair number of quests which aren't offered until you've reached a certain level. Be prepared for quite a shock when you assign those points.