You essentially have three heat press choices: clam shell; swinger, or draw.
The clam shell press is easy for beginners to use. However, it may not be suitable for all thicker garments and layout occurs under the heat source (the upper platen). The upper and lower platens are joined by a hinge at the back. The upper platen is lowered onto the lower platen to apply pressure and heat to the garment.
The swinger press allows for easier layout as the upper platen swings away to one side but this means that it requires more space than the clam shell. Since the upper platen swings away, setup is not under heat. Experienced operators can produce more work on a swinger than on a clam shell.
The lower platen of the draw press pulls forward for layout and is then slid back before the upper platen is lowered to apply heat and pressure. The draw press is conducive to higher volumes of work but also requires more room than a clam shell.
You have digital versus manual features to consider and, of course, price. But this overview of your choices is a good place to start your research.