Congratulations on your recent Take 5 acquisition. It really is a great little synth for the money.
If you're learning, a good way to figure out how a patch works is to select a factory preset you like, then go through the program menu to see what's set up, and scroll through the mod matrix as well. To see how the knobs are set, slowly turn each knob and you'll see a dot (decimal point) in the LED display light up when you pass/hit the saved position.
Here's some tips I've compiled as I've been playing and programming mine. I have more, but these are good for someone starting out.
1. There's a sweet spot around 10 o'clock on the osc mixer levels. When turned higher it gets more compressed, and it drowns out the filter resonance.
2. The filter drive knob has a subtle effect, most noticeable with resonance turned up. Experiment with it.
3. Filter keytracking is in the program menu, item #12. Just putting this here so you can get to it quickly when needed.
4. In the basic program, LFO1 is routed to Osc1 Fine initially. If you want vibrato with both oscs, change this to OscAll Fine. A quick way to do this is to hold LFO1 Dest, then Osc2 Pitch to select Osc2 Fine, then turn the Value knob clockwise one click to reach OscAll Fine.
5. The Osc1 and 2 Pitch knobs have a +/- 7 semitone (700 cent) range. If you want to dial in an interval precisely, these parameters are available in the program menu as well, with the value displayed, so you can dial it in precisely.
6. To find a slot to save your patch in, hit Write to enter write mode, then hit Compare. From here you can select preset slots and hear the presets that are saved in them. When you find the one you want to overwrite, hit Compare again to return to your patch, (optionally change the name) and hit Write again to save.