The best blueprint to start with was Basic Filters. It was 1 oil and 1 lyst. For a beginner, it will probably still be your best bet. Folks used to be able to skill on filters for ages and just rack up skill points, but not any longer. After awhile, you'll get next to no skills doing filters and you'll have to move up to higher levels, meaning more initial cost. Its not too bad though.
Nice to see someone showing interest in manufacturing.