fix tutorial notebook not using strings for optimizer

README.md

@@ -16,7 +16,9 @@ The library provides:
 ### Pip
 In order to use th file `pyproject.toml` it is necessary to guarantee `pip>=21.8`. If necessary upgrade `pip` using `python -m pip install --upgrade pip`. 
 
-Install the library with `pip install git+https://github.com/IBM/terratorch.git`
+Install the library with `pip install git+https://github.com/IBM/terratorch.git`.
+
+TerraTorch requires gdal to be installed, which can be quite a complex process. If you don't have GDAL set up on your system, we reccomend using a conda environment and installing it with `conda install -c conda-forge gdal`.
 
 To install as a developer (e.g. to extend the library) clone this repo, install dependencies using `pip install -r requirements.txt` and run `pip install -e .`
 

docs/quick_start.md

@@ -1,6 +1,8 @@
 # Quick start
 We suggest using Python==3.10.
-To get started, make sure to have `PyTorch >= 2` [installed](https://pytorch.org/get-started/locally/). 
+To get started, make sure to have [PyTorch](https://pytorch.org/get-started/locally/) >= 2.0.0 and [GDAL](https://gdal.org/index.html) installed. 
+
+Installing GDAL can be quite a complex process. If you don't have GDAL set up on your system, we reccomend using a conda environment and installing it with `conda install -c conda-forge gdal`.
 
 Install TerraTorch with `pip install git+https://github.com/IBM/terratorch.git`