This is the summery of all your mistakes:
1- Coin collecting is a hobby, supposed to be for FUN.
2- "Knowledge is King" and "Education is the key to collector success"
3- Buy if you can afford it.
4- One way to collect is: Try to focus on quality instead of quantity.
5- The other way is: Fill common holes right away. It focuses your collecting efforts on the handful of tougher dates, and gets you acquainted with their scarcity.
6- Try to share your passion for the hobby with someone you trust.
7- Again "Knowledge, Knowledge, Knowledge.... you have to read, ask and listen to more experienced collectors"
8- It's very hard to sell coins for what you'd pay for them. So wait for ultra-bargains, unless it's a really tough coin/date.
9- In particular, roll-search more early on and try to find stuff for "free" from circulation.
10- Try to find your theme in collecting, the earlier you find it the better your collection will be.
11- Try to buy all the Key dates instead of wasting money on other (frivolous non-numismatic) things.
12- Dont you ever clean or polish coins.
13- If you dont know what to do, PLEASE ask the right person.
14- There is always the easy way and the hard way, its your choice.
15- Again and again "Knowledge".
16- Sharing your coins with a more knowledgeable/experienced collector will give you more information as well as proper guidance.
17- Hold high value coins while wearing cotton gloves or at least from the rim using clean, dry hands.
18- NOW is the time to be buying... time goes on whether we want it to or not, and in 20 years don't be one of those people who then are saying "I wish I had have bought more coins back 2011." History has a way to repeat itself unless you learn from it!
19- If you have the money, invest part of your coin budget in bullion.
20- Collecting coins is not a fashion, so you choose a great hobby.
21- You are young, and you are allowed to do mistakes But dont repeat them nor ours.
Still waiting for you mistakes to add
