I need help replacing a bathroom drain plug

Hi there, I’m looking for a skilled handyperson to replace a faulty bath/shower drain plug in my apartment. The current plug won’t seal properly and there’s a slow drip when the water drains. I’ve purchased a standard replacement, but I’m not confident about installing it correctly without causing leaks. I’d prefer someone with basic plumbing experience who can check the pipework for any wear and ensure a watertight seal. Accessibility is straightforward, and I’m hoping to complete the job within a few hours on a weekday afternoon. Please bring basic tools, or let me know if I should provide anything else beforehand.