Подскажите, пожалуйста, какая отрасль страхования и оценки (оценщик) больше всего востребована?

Приезжайте в Австралию, сдайте экзамен на лицензию, заплатите и работайте, откройте свой бизнес.

In Australia, all Insurance Brokers are required to be licensed by the Federal Government’s Australian Securities and Investments Commission (ASIC).
Reputable and experienced insurance brokers in Australia will generally also hold additional qualifications such as a Certificate or Diploma in Financial Services which requires the completion of in depth studies in a specific area, the most common being General Insurance or Insurance Broking.
Within Australia there are also a number of industry bodies that issue professional accreditations to members that comply with best standards of professional practice and integrity and maintain up to date skills and knowledge. The two main accreditations are ANZIIF's CIP (Certified Insurance Professional) and NIBA's QPIB (Qualified Practicing Insurance Broker).

Dealing with an insurance broker as opposed to directly with an insurer is something many customers (particularly businesses) choose to do in Australia for the following main reasons;
the ease of having the "shopping around done for them", having the opportunity for premium funding which allows for larger insurance policies to be paid in installments rather than all at once;
dealing with one broker for all policies from the Car Insurance to professional indemnity insurance rather than dealing directly with several insurers, and the ease of having claims managed by the broker who deals directly with the insurer on the client's behalf which typically expedites processing time and assists in achieving a favourable outcome.

Надеюсь, что перевод Вам не нужен.

Простите, а что значит "какая отрасль страхования наиболее востребована"? Вы хотите свою страховую компанию открыть и никак не можете решить какую именно?

Что касается оценки, эта деятельность лицензируется. Кроме того, многие оценщики работают не за зарплату, а независимо.