Great to see you want to go boating!
Theres nothing really wrong with a 14 - 16 boat as long as its in good condition and you have all the safety gear.
Great tip above - get it checked by the experts first! invaluable.
However, one thing you must always - always remember and I keep telling people on my boat.
NEVER EVER let the anchor come in contact with anything other than the front of the boat.
The tide, no matter how small can pull you down quicker then yo can think why if it is on the side or worst still the stern, and floatation tanks and the like wont help either.
And no matter what safety gear you have, radio, flares etc you will not even have chance to reach it - or your life jacket, believe me i've seen it happen, albeit here in the bristol channel where the tides are very strong.
Please though don't forget all the other things you need to do before actually launching, more this is a tip for when you are actually out there.
Sorry to go on but it is usually the one thing that even experienced small

boaters forget.
Happy boating, give it a go, i'm sure you will love it and wont look back. I've been out there for the last 23 years and would not give it up for anything.
Poppajoe (steve)