Being new to cypto i'm not sure how my coin allocation should look. My current portfolio allocation is 50% BTC, 35% LTC, 15% ETH does this sound ok?
You can't be "sure" of anything. I haven't heard of someone who has a crystal ball yet so don't take anyone's word for it.
There is no correct way to build your portfolio, but instead yourself a lot of questions like "Why do I hold 50% in BTC and not in altcoins?" or "Why is my LTC allocation bigger than ETH?". Take responsibility for your allocation, do not try to blame others by following their opinion - just my advice.