I would suggest you start with Luke or John and then go to Acts. What version of the Bible do you have? You can also get google E100, which takes you through from the beginning to the end of the Bible in 100 small bites.
I would recommend starting with The Lion's Children's Bible. Although it's for children, more like 10 years +. The advantage of this book is that you can zoom through the old and new testaments and get a good idea of how the key stories fit together.
After that, "30 days" by Nicky Gumbel. This book, for about £4, takes you through 30 key passages and explains them. It starts with the Parable of the Sower. Once you have read the 30 passages, you are in a good position to fly solo.
I would suggest you read the OT thoroughly and then the NT and see that they ar3 2 different entities. Have a look at the marcion thesis. The God of death and anger and destruction. Then the love Ns peace Jesus brings. The contradictions are immense yet ignored because the church is a business. Good luck