6500 reels aren't much cop for mixed ground - for your money I'd probably look for a 2nd hand Penn 525 mag / mag extra / supermag; you should be able to get a mint one for £70-80, a more worn one for £50-60. Load it with 18-20lb line (not too full to start with!) & a leader, and start with the mags on full. It'll be like casting with the handbrake on, so as you get used to it back the mags off a notch at a time until it feels comfortable - it's a reel that you can "grow into" as your technique improves & should serve you well whatever ground you choose to fish.
Gary