Mining is probably the best way for new players to start. Make sure you read the mining guides, and here's a few tips:
1. Outdoor mining generally maintains a 33% hit rate. If you are way below that you are either mining in an area above your level or your equipment is too low for you, even though SIB is activated.
2. To check your equipment, take the max depth and your actual depth (to the left) should be about 80% of the max. Drops per minute should be maxxed.
3. Find a relatively flat area and use "p" to mark off 110 meters. Run that several times to get an accurate time in seconds. This is the minimum distance between drops.
4. Many people think that dropping entmatter only saves money. It does not. The reason is that the average entmatter find is II-III, while the average ore find is IV-V. The average entmatter find is not half the average ore find.
5. DO NOT: use amps, go to pvp areas, use enhancers, go to an indoor area, or double bomb, at least until you are more experienced. In general, level 10 makes you a beginner, level 20 makes you a high beginner.
6. Try to get a vehicle. Not only does this make the drops faster, but it also protects you from wandering monsters. Flying vehicles will instantly stop monsters from chasing you, except flying monsters.
7. Read mining guides.
8. You do not need to keep upgrading finders after you have maxxed one. One way to upgrade is: TT finder, F-101, F-102, F-103, F-105, then the F-105 forever. Deeper finders just mean rarer finds, not bigger finds. In mining, size matters. Because markup on rares is so bad, you must be able to find large commons, not small rares. (note: the F-104 is hard to get because it requires dunkel to be crafted. Just skip it and go from the 103 to the 105.)
9. Stick to the TT extractor. If your planet only has L finders, bring 2.
10. Don't refine your ores/ents until you can afford a T-104. Usually, your finds will be so small holding them for auction is unrealistic. Don't save anything for auction unless MU is 110% or higher, as you can sell stacks of 50 ped or so and still beat the fees. At 105% or lower, you need stacks of 100 ped to make a profit.