New Member From Switzerland

Hello to all and greetings from Switzerland. I am 60+ years old , early retired due to neuro-illness and I live in a care home for elderly people in Switzerland. In 2017 I was looking for an American coin with a native motive - Sacagawea dollar and found it on ebay. From there on I started buying and collecting Kennedy halves and bought them from ebay and later from a Swiss site. I made all the errors every newbie does, buying with no strategy and with high premiums. Nowadays I specialize in Lincoln cents. Whenever I win the auction I buy 20 lbs. of coins. It takes me a whole day to search them through looking for nice coins and the ones with possible errors/varieties. I watch a lot of youtube videos of my preferred coin guys where I get all the knowledge that helps me cherry picking coins.
BlueRidgeSilverhound also shows errors and fancy serial numbers. Since I work with VBA in Excel I like numbers. Going thru many 1$ bills I've only found some Star notes and broken ladders in bad shape.
Let me see if I got it right - 1st. print is on back of the note, 2nd. print is on front of the note and the Overprint with the District Seal w/number(twice) and the 2 Serial Numbers.
Kind regards,
Andy