As the head of our Parish’s RCIA program, I work very closely with our parish advocate for annullments, and the tribunal at the diocesean level.
Based on what the OP has stated, the responses you have received so far have been correct.
In the eyes of the Church, the first marriage is considered valid, even though it ended in divorce. The second one isn’t/wasn’t, because the cause for annullment of the first one was not investigated.
The Church initally considers all first marriages valid, including civil marriages, because a sacramental bond could exist even though the ceremony itself may have been a civil one.
There is an investigative process involved which looks at many factors, including which members of the marriage were baptized or not, was one individual baptized Catholic,etc.
Previous posters were correct when they stated that should there be a possiblity of another marriage in the future, you should speak with your priest, or parish advocate for annullments to get that taken care of. (currently, in our diocese, that can take 18 months or so)
On a personal level, I agree with previous posters that there would be nothing wrong with telling people (if you choose) that you are widowed, but in the eyes of the Church, you are technically divorced.
God Bless you on your journey.