Starting an online business in Bangladesh involves several steps. Here is a general guide to help you get started:
https://www.bdtask.com/blog/ecommerce-business-in-bangladesh

Market Research:

Identify your target audience and understand their needs.
Analyze the competition in your chosen niche.
Research the legal and cultural aspects of doing business in Bangladesh.
Choose a profitable niche:

Select a niche that has demand in the Bangladeshi market.
Consider your interests, skills, and expertise.
Business Plan:

Create a detailed business plan outlining your goals, target market, marketing strategy, and financial projections.
Legal Formalities:

Register your business with the relevant authorities in Bangladesh.
Obtain any necessary licenses or permits.
Domain and Website:

Choose a domain name that reflects your business.
Set up a professional website. You can use platforms like Shopify, WordPress, or hire a web developer.
Payment Gateway:

Set up a secure payment gateway to facilitate online transactions. Popular options include Stripe, PayPal, or local options like bKash.
Logistics and Delivery:

Plan your logistics and delivery system. You may partner with local courier services or consider third-party logistics providers.
Marketing:

Utilize social media platforms like Facebook, Instagram, and Twitter for marketing.
Consider paid advertising and influencer partnerships.
Customer Service:

Provide excellent customer service to build trust and loyalty.
Consider implementing a chat support system on your website.
Mobile Optimization:

Ensure that your website is mobile-friendly, as a significant portion of internet users in Bangladesh access the internet through mobile devices.
Understand Payment Methods:

Be familiar with the payment methods preferred by the Bangladeshi audience. bKash, Rocket, and other mobile banking methods are widely used.
Cybersecurity:

Invest in cybersecurity measures to protect customer data and build trust.
Build Partnerships:

Collaborate with local influencers or businesses to expand your reach.
Stay Informed:

Stay updated on e-commerce trends, customer preferences, and any changes in regulations.
Scale Gradually:

Start with a manageable product range and gradually expand based on customer feedback and market trends.
Remember to adapt your strategy based on the changing business environment and feedback from your customers. Building a successful online business takes time and persistence.