Have you tried contacting your University to see if they have a license for a qualitative/quantitative software package? I would have thought they must have one? Mixed-method packages do exist such as MAXQDA - although I've not ever used it! I'm soon to do some qualitative/quantitative research for my masters and I'm interested in using the mixed-method (assuming I'm right in thinking it is what it is) for it, which is why I've responded to your question. Our University has access to Qualtrics if I'm not mistaken. Doing a quick search on their help section on their website hints at their software is capable of using this subset analysis.

https://www.qualtrics.com/uk/experience-management/research/research-design/?rid=ip&prevsite=en&newsite=uk&geo=GB&geomatch=uk

Maybe this answer can help

For the Qualitative software you can use:

1. NVIVO (In app license)

2. Vosview (Free)

3. Publish and Perish (Free, note: need integration to your scopus ID)

For Quantitative:

1. SPSS (In app licence)

2. Smart PLS (Free for student, limitation dataset, for unlimited dataset using professional license)

Thank You