Please is there a spreadsheet service for Ubuntu which I can easily install to provide a similar web service just for myself like Google Sheets or Excel online? It can be a really simple spreadsheet solution (sophistication of basic spreadsheet functionality from 20 years ago would be fine, though with the web service access - no complex formula or other modern features that Google Sheets and Excel offer are needed).
I often find a spreadsheet better than a document for organising text (as cells, columns and rows etc), please say if you know of something else that might be suitable.
I saw LibreOffice but it seemed that's a complex install to provide the web service over HTTP.
Thanks!