Here are some ideas for the homepage layout and design for a marketplace similar to Airtasker based on the information you provided:

Location and Task Focus

Have a search bar prominently displayed where users can enter their location and the type of task they need help with. This allows users to easily find relevant tasks.
Below the search bar, display categories of popular tasks available in the user's city. This further helps them refine their search.
Task Focus Only

Instead of focusing on location upfront, allow users to first select the task they need help with from different categories.
Once they select a category, they can enter their location to find taskers. This puts emphasis on tasks rather than location.
Location Focus Only

Display a map and allow users to enter or select their location first.
Once they add their location, then show categories of tasks frequently requested in that area.

Some sites to take inspiration from:
Airtasker
TaskRabbit
Fiverr
UrbanClap
Amazon Home Services

Key elements to include:
Easy search and filters
Clear navigation/categories
Prominently display top-rated or reviewed taskers
Include testimonials
Focus on visuals—videos or images of tasks
Clear pricing/packages
Simple signup/login process
Emphasize security and screening of taskers
I hope these ideas and examples help guide the homepage design and layout in a way that drives conversions! Let me know if you need any other specifics.