Welcome to the forum! As you are finding out, there is a fair bit to successfully completing your first build. You will find tons of info in our FAQ's, stickies, and by searching the old posts. Sam's Laser FAQ is another great source of laser info. The suggestion to build a bluray laser is a good one. This laser can burn, and also be used to explore fluorescence and phosphorescence. You would need a PHR-803T sled, or the diode from same, an aixiz module, and either buy a rkcstr driver set to 100mA, or build a DDL driver (search DDL) which is cheap and easy, set to 100mA. 3 x 10440 lithium batteries could power it. The laser can be housed in an altoids tin (search Altoids laser) or in a fancy host. Several members here sell heatsinks and hosts. The heatsink conducts heat away from the module, and adapts the module to fit the host. If you have access to a metal lathe, you are home free. Please keep in mind the need for appropriate eye protection as you build or buy powerful lasers.