I started off with "easy cast" castin craft . LOVE IT!
1.make sure you store it inside though.. I used to keep mine outside during winter and it turned yellow and wouldn't release the bubbles.
2.Work outside though, away from any animals or kids because it spreads EXTREMELY easily, but let them harden inside (after they're mixed) to keep them at a more even temperature
3. if you are going to cast them in a mold, use resin mold release and what I do to pop them out quickly is take my dad's little can of compressed air(
we use office max brand) flip it upside down and spray it on the mold.. it is SUPER SUPER cold and gets them out very quickly
4. use an old paintbrush to pain resin on a picture or item before you put it in the bottlecap or mold, this will make sure there are no air bubbles.
5. for cleanup, use rubbing alcohol not water
6. if you want to use a mold over and over again, get one designed for resin.. I recently used a soap mold because I needed a bunch of little hearts and the resin ruined the mold but the hearts are perfect , so soap molds are for one time use only
all of that may sound scary but once you get started with resin it is so much fun and you have the step up, because I learned all of that from experience