Be careful. A lot of countries, especially Germany and the Netherlands, will hire foreigners at the junior level to work on senior people's projects but will not let you progress. Your PhD may not always be marketable in other countries so if you choose a small country with limited options for you, it is a dead end. Law is not like science. Law schools everywhere are very conservative in how they hire faculty and what PhDs they recognise. Canada is still okay because it is large but you'll need to learn french fluently for many universities there.

If you don't have a PhD yet, and your undergrad and Masters degree are both from India, then the first step would be to apply for a fully funded PhD fellowship in the country where you wish to teach eventually. While working on your PhD, your Fellowship will allow you to take the occasional class, help senior faculty do research and also focus on publications. Focus on quality rather than quantity. At your level, even 3 quality international publications would be good. Try to focus on learning dissemination of research, creating impact of your study and how to draft effective project funding proposals. These are skills valued in academics abroad, but barely taught in India otherwise. On finishing your PhD, you would get access to lecturer positions (UK, Germany, Canada, Scandinavian countries), especially if you manage to obtain decent recos from your supervisor. In the USA, it's difficult, people struggle a lot to get entry level teaching positions on a contract, let alone become tenure track. Contacts would play a large role.

If you have already got your PhD from here, then you should start by applying for the various post-doc fellowships abroad. If you have got regulatory experiences (SEBI, CCI, TRAI etc.), scholarships and fellowships are easier to get. Also start participating in international conferences for both exposure and networking purposes. Several foreign law journals issue open calls for guest editors, visiting editors etc. Try applying for those too. It's an incremental process.

A simple guest lecture is easy if you are good at your work. Seminar/ guest visits will become possible with seniority, good networks and a good international reputation. More than that is very difficult. You'll have to plan a very good PhD and publication path and hope for the best. Some countries are easier than others.