I think it is awesome that you come here to ask your question; you couldn't have come to a better place.
First you must decide if you prefer traditional folding knives or modern folding knives.
Traditional knives are built with pins instead of screws. You can not take them apart. They do not have thumbstuds or opening holes; they cannot be opened one-handed. Their blades are thinner, so generally speaking they slice better. They are normally designed used very old and traditional patterns. Most of them are slipjoints (the blade does not lock open), however it is easy to find locking versions. In order of increasing expense I would recommend Rough Rider, Victorinox, Case, Great Eastern Cutlery, and Moki.
Modern knives are built with screws (they can be disassembled), are more likely to made using modern steels, and typically have locking blades. The scale materials are more likely to be plastic (cheaper models) or G10 (premium models). They come with thumbstuds, flippers, or opening holes, so they can be opened one-handed. There are so many decent brands I hesitate to recommend some; but (in order of increasing expense), you can't go wrong with Kershaw, Cold Steel, Spyderco, or Benchmade.
This is just general information to get you started (there are hybrid models that share traditional and modern features).
First you must decide if you prefer traditional folding knives or modern folding knives.
Traditional knives are built with pins instead of screws. You can not take them apart. They do not have thumbstuds or opening holes; they cannot be opened one-handed. Their blades are thinner, so generally speaking they slice better. They are normally designed used very old and traditional patterns. Most of them are slipjoints (the blade does not lock open), however it is easy to find locking versions. In order of increasing expense I would recommend Rough Rider, Victorinox, Case, Great Eastern Cutlery, and Moki.
Modern knives are built with screws (they can be disassembled), are more likely to made using modern steels, and typically have locking blades. The scale materials are more likely to be plastic (cheaper models) or G10 (premium models). They come with thumbstuds, flippers, or opening holes, so they can be opened one-handed. There are so many decent brands I hesitate to recommend some; but (in order of increasing expense), you can't go wrong with Kershaw, Cold Steel, Spyderco, or Benchmade.
This is just general information to get you started (there are hybrid models that share traditional and modern features).