First at all, welcome to Angola. It always a big challenge to move to unknown country culturaly different than our home country.
Lobito is an amazing place to live I have been there for several times.
Angola is now having a great economic growth period. There is still a lack of qualified and experienced persons.
As an experienced and high qualified person I think that you won´t face too much difficulties to get a job compatible with your qualifications. Apart from that, you have already got the resident permit. I can say you that the biggest problem for foreign people who are currently working here is legalize themselves in the country. Therefore, you are in a good situation to achieve your goal. I therefore would advise you to look for a job in multinational companies, specialy oil and gas companies which are operating in the country. I guess on this setting the possibilities you can be sucessfull are significally greater. However; put on your mind that the most of qualified jobs are in Luanda.
I wish you all the best,
Nelson