Help, tips and tricks please?

Hello everyone! I’m brand new to resin in fact I haven’t received all the supplies I ordered yet lol! I’m really interested in making beach scenes with look a like ocean and waves,riverbed-tables and those spheres with one big flower in them usually used for paperweights. Can you tell me some do’s and don’ts, what CAN’T be placed in resin, how do you pop bubbles, are the flower spheres hard to make, what are some easier projects to start out with and any other advice you could give me would be greatly appreciated! Thank you very much 🩷